Hello everyone,

I'm trying to get KDE work on my new laptop. startx command seems to work fine (displays xterm), but when I run /etc/init.d/xdm start all I get is a black screen. Kdm is complaining about no DBUS session-bus found (among other things) even though /etc/init.d/dbus status gives status: started. I'm not sure what is wrong...

Thank you for any help

/var/log/kdm.log:

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X.Org X Server 1.16.4
Release Date: 2014-12-20
X Protocol Version 11, Revision 0
Build Operating System: Linux 4.0.5-gentoo x86_64 Gentoo
Current Operating System: Linux xen 4.0.5-gentoo #9 SMP Sun Sep 27 22:43:29 CEST 2015 x86_64
Kernel command line: root=/dev/sda3
Build Date: 27 September 2015  09:02:32PM
 
Current version of pixman: 0.32.6
   Before reporting problems, check http://wiki.x.org
   to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
   (++) from command line, (!!) notice, (II) informational,
   (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Sep 29 10:12:03 2015
(==) Using config file: "/etc/X11/xorg.conf"
(==) Using config directory: "/etc/X11/xorg.conf.d"
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
klauncher(2698) kdemain: No DBUS session-bus found. Check if you have started the DBUS server.
kdeinit4: Communication error with launcher. Exiting!
kdmgreet(2692)/kdecore (K*TimeZone*): KSystemTimeZones: ktimezoned initialize() D-Bus call failed:  "Not connected to D-Bus server"

kdmgreet(2692)/kdecore (K*TimeZone*): No time zone information obtained from ktimezoned
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  139 (RANDR)
  Minor opcode of failed request:  35 ()
  Value in failed request:  0x1e1
  Serial number of failed request:  16
  Current serial number in output stream:  17


installed kde packages (eix -IcC kde-)

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[I] kde-apps/attica (4.14.3(4)@09/27/2015): Open Collaboration Services provider management
[I] kde-apps/baloo-widgets (4.14.3(4)@09/27/2015): Widget library for baloo
[I] kde-apps/dolphin (4.14.3(4)@09/27/2015): Plasma filemanager focusing on usability
[I] kde-apps/drkonqi (4.14.3(4)@09/27/2015): KDE crash handler, gives the user feedback if a program crashed
[I] kde-apps/kcmshell (4.14.3(4)@09/27/2015): KCMShell is a utility to host KDE control modules independently of SystemSettings
[I] kde-apps/kcontrol (4.14.3(4)@09/27/2015): The KDE Control Center
[I] kde-apps/kde-base-artwork (4.14.3(4)@09/27/2015): KDE base artwork
[I] kde-apps/kde-wallpapers (4.14.3(4)@09/27/2015): KDE wallpapers
[I] kde-apps/kdebase-data (4.14.3-r1(4)@09/27/2015): Icons, localization data and various .desktop files from kdebase
[I] kde-apps/kdebase-desktoptheme (4.14.3(4)@09/27/2015): Oxygen KDE4 desktop theme
[I] kde-apps/kdebase-kioslaves (4.14.3(4)@09/27/2015): kioslave: the kde VFS framework - kioslave plugins present a filesystem-like view of arbitrary data
[I] kde-apps/kdebase-menu (4.14.3(4)@09/27/2015): KDE Menu query tool
[I] kde-apps/kdebase-menu-icons (4.14.3(4)@09/27/2015): KDE menu icons
[I] kde-apps/kdebase-meta (4.14.3(4)@09/28/2015): Merge this to pull in all kdebase-derived packages
[I] kde-apps/kdebase-runtime-meta (4.14.3(4)@09/28/2015): Merge this to pull in all kdebase-runtime-derived packages
[I] kde-apps/kdebugdialog (4.14.3(4)@09/27/2015): KDE: A dialog box for setting preferences for debug output
[I] kde-apps/kdepasswd (4.14.3(4)@09/27/2015): KDE GUI for passwd
[I] kde-apps/kdesu (4.14.3(4)@09/28/2015): KDE: gui for su(1)
[I] kde-apps/kdialog (4.14.3(4)@09/27/2015): KDialog can be used to show nice dialog boxes from shell scripts
[I] kde-apps/kdontchangethehostname (4.14.3(4)@09/27/2015): Tool to inform KDE about a change in hostname
[I] kde-apps/keditbookmarks (4.14.3(4)@09/27/2015): KDE's bookmarks editor
[I] kde-apps/keditfiletype (4.14.3(4)@09/27/2015): KDE mime/file type assocciation editor
[I] kde-apps/kfile (4.14.3(4)@09/27/2015): A commandline frontend to KFileMetaInfo
[I] kde-apps/kfind (4.14.3(4)@09/27/2015): KDE file finder utility
[I] kde-apps/kfmclient (4.14.3(4)@09/27/2015): KDE tool for opening URLs from the command line
[I] kde-apps/kglobalaccel (4.14.3(4)@09/27/2015): KDE's Global Shortcut Daemon
[I] kde-apps/kiconfinder (4.14.3(4)@09/27/2015): Finds an icon based on its name
[I] kde-apps/kimgio (4.14.3(4)@09/27/2015): KDE WebP image format plugin
[I] kde-apps/kioclient (4.14.3(4)@09/27/2015): Command-line tool for network-transparent operations
[I] kde-apps/kmimetypefinder (4.14.3(4)@09/27/2015): KDE application to report the mimetype for a given file
[I] kde-apps/knetattach (4.14.3(4)@09/27/2015): KDE network wizard
[I] kde-apps/knewstuff (4.14.3(4)@09/27/2015): KDE4 software to download and upload 'new stuff'
[I] kde-apps/knotify (4.14.3(4)@09/27/2015): The KDE notification daemon
[I] kde-apps/konq-plugins (4.14.3(4)@09/27/2015): Various plugins for konqueror
[I] kde-apps/konqueror (4.14.3(4)@09/27/2015): KDE: Web browser and file manager
[I] kde-apps/konsole (4.14.3(4)@09/28/2015): KDE's terminal emulator
[I] kde-apps/kpasswdserver (4.14.3(4)@09/27/2015): KDED Password Module
[I] kde-apps/kquitapp (4.14.3(4)@09/27/2015): A CLI application quitter
[I] kde-apps/kreadconfig (4.14.3(4)@09/27/2015): KDE: A command-line tool to read KConfig entries
[I] kde-apps/kstart (4.14.3(4)@09/27/2015): KDE: Utility to launch applications with special window properties
[I] kde-apps/ktimezoned (4.14.3(4)@09/27/2015): KDE: Timezone daemon
[I] kde-apps/ktraderclient (4.14.3(4)@09/27/2015): A command-line tool for querying the KDE trader system
[I] kde-apps/kuiserver (4.14.3(4)@09/27/2015): KDE: Progress Info UI server
[I] kde-apps/kurifilter-plugins (4.14.3(4)@09/27/2015): KDE: Plugins to manage filtering URIs
[I] kde-apps/kwalletd (4.14.3-r2(4)@09/27/2015): KDE Password Server
[I] kde-apps/kwalletmanager (4.14.3(4)@09/27/2015): KDE Wallet Management Tool
[I] kde-apps/kwrite (4.14.3(4)@09/27/2015): KDE simple text editor
[I] kde-apps/libkonq (4.14.3(4)@09/27/2015): The embeddable part of konqueror
[I] kde-apps/nsplugins (4.14.3(4)@09/27/2015): Netscape plugins support for Konqueror
[I] kde-apps/oxygen-icons (4.14.3(4)@09/27/2015): Oxygen SVG icon theme
[I] kde-apps/phonon-kde (4.14.3(4)@09/27/2015): Phonon KDE Integration
[I] kde-apps/plasma-apps (4.14.3(4)@09/27/2015): Additional Applets for Plasma
[I] kde-apps/plasma-runtime (4.14.3(4)@09/27/2015): Script engine and package tool for plasma
[I] kde-apps/renamedlg-plugins (4.14.3(4)@09/27/2015): KDE RenameDlg plugins
[I] kde-apps/solid-runtime (4.14.3(4)@09/28/2015): KDE SC solid runtime modules (autoeject, automounter and others)
[I] kde-apps/svgpart (4.14.3(4)@09/27/2015): Svgpart is a kpart for viewing SVGs
[I] kde-apps/zeroconf-ioslave (4.14.3(4)@09/27/2015): A DNSSD (DNS Service Discovery - part of Rendezvous) ioslave and kded module
[I] kde-base/baloo (4.14.3(4)@09/28/2015): Next generation of the Nepomuk project
[I] kde-base/freespacenotifier (4.11.19(4)@09/27/2015): A module that monitors free disk space on the home dir
[I] kde-base/kactivities (4.13.3(4)@09/28/2015): KDE Activity Manager
[I] kde-base/katepart (4.14.3(4)@09/27/2015): KDE Editor KPart
[I] kde-base/kcheckpass (4.11.19(4)@09/27/2015): A simple password checker, used by any software in need of user authentication
[I] kde-base/kcminit (4.11.19(4)@09/27/2015): KCMInit - runs startups initialization for Control Modules
[I] kde-base/kde-env (4.14.3(4)@09/27/2015): Environment setting required for all KDE4 apps to run
[I] kde-base/kdebase-cursors (4.11.19(4)@09/27/2015): oxygen cursors from kdebase
[I] kde-base/kdebase-pam (9@09/27/2015): pam.d files used by several KDE components
[I] kde-base/kdebase-startkde (4.11.19(4)@09/27/2015): Startkde script, which starts a complete KDE session, and associated scripts
[I] kde-base/kdelibs (4.14.8(4)@09/27/2015): KDE libraries needed by all KDE programs
[I] kde-base/kdepimlibs (4.14.8(4)@09/27/2015): Common library for KDE PIM apps
[I] kde-base/kdm (4.11.19(4)@09/27/2015): KDE login manager, similar to xdm and gdm
[I] kde-base/kephal (4.11.19(4)@09/27/2015): Allows handling of multihead systems via the XRandR extension
[I] kde-base/kfilemetadata (4.14.3(4)@09/27/2015): A library for extracting file metadata
[I] kde-base/khelpcenter (4.14.3(4)@09/27/2015): The KDE Help Center
[I] kde-base/khotkeys (4.11.19(4)@09/27/2015): KDE: hotkey daemon
[I] kde-base/kinfocenter (4.11.19(4)@09/27/2015): The KDE Info Center
[I] kde-base/klipper (4.11.19(4)@09/27/2015): Applet for KDE and X clipboard management
[I] kde-base/kmenuedit (4.11.19(4)@09/27/2015): KDE menu editor
[I] kde-base/krunner (4.11.19(4)@09/27/2015): KDE Command Runner
[I] kde-base/kscreensaver (4.11.19(4)@09/27/2015): KDE screensaver framework
[I] kde-base/ksmserver (4.11.19(4)@09/27/2015): The reliable KDE session manager that talks the standard X11R6
[I] kde-base/ksplash (4.11.19(4)@09/27/2015): KDE splashscreen framework (the splashscreen of KDE itself, not of individual apps)
[I] kde-base/kstartupconfig (4.11.19(4)@09/27/2015): KDE: Utility to launch applications with special window properties
[I] kde-base/kstyles (4.11.19(4)@09/27/2015): KDE: A set of different KDE styles
[I] kde-base/ksysguard (4.11.19(4)@09/27/2015): KSysguard is a network enabled task manager and system monitor application
[I] kde-base/ksystraycmd (4.11.19(4)@09/27/2015): Ksystraycmd embeds applications given as argument into the system tray
[I] kde-base/kwin (4.11.19(4)@09/27/2015): KDE window manager
[I] kde-base/kwrited (4.11.19(4)@09/27/2015): KDE daemon listening for wall and write messages
[I] kde-base/libkgreeter (4.11.19(4)@09/27/2015): Conversation widgets for KDM greeter
[I] kde-base/libkworkspace (4.11.19(4)@09/27/2015): A library for KDE desktop applications
[I] kde-base/liboxygenstyle (4.11.19(4)@09/27/2015): Library to support the Oxygen style in KDE
[I] kde-base/libplasmaclock (4.11.19(4)@09/27/2015): Libraries for KDE Plasma's clocks
[I] kde-base/libplasmagenericshell (4.11.19(4)@09/27/2015): Libraries for the KDE Plasma shell
[I] kde-base/libtaskmanager (4.11.19(4)@09/27/2015): A library that provides basic taskmanager functionality
[I] kde-base/plasma-workspace (4.11.19(4)@09/27/2015): Plasma: KDE desktop framework
[I] kde-base/powerdevil (4.11.19(4)@09/27/2015): PowerDevil is an utility for KDE4 for Laptop Powermanagement
[I] kde-base/qguiplatformplugin_kde (4.11.19(4)@09/27/2015): Helps integration of pure Qt applications with KDE Workspace
[I] kde-base/solid-actions-kcm (4.11.19(4)@09/27/2015): KDE control module for Solid actions
[I] kde-base/systemsettings (4.11.19(4)@09/27/2015): System settings utility
[I] kde-misc/kde-gtk-config (2.2.1(4)@09/27/2015): KDE systemsettings kcm to set GTK application look&feel
[I] kde-misc/kscreen (1.0.2.1(4)@09/27/2015): Alternative KDE screen management


That's the system dbus, but kdm complains about missing session dbus.
Do you have a running X server ("ps ax | grep X") when starting xdm/kdm? If not, check /var/log/Xorg.0.log
It probably crashed (for some reason which is hopefully listed there)

luebking wrote:That's the system dbus, but kdm complains about missing session dbus.
Do you have a running X server ("ps ax | grep X") when starting xdm/kdm? If not, check /var/log/Xorg.0.log
It probably crashed (for some reason which is hopefully listed there)

Thanks for reply. Tried to look into it, but not sure I found anything helpful.

Output of: ps ax | grep x

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 8259 tty7     Ss+    0:00 /usr/bin/X :0 vt7 -nolisten tcp -auth /var/run/xauth/A:0-nBH8Ja
 8283 pts/0    S+     0:00 grep --colour=auto X

Difference of Xorg.0.log-s of normally running X after runnging startx marked < and after running /etc/init.d/xdm start (marked with >):

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16c16
<  (==) Log file: "/var/log/Xorg.0.log", Time: Wed Sep 30 17:45:56 2015
---
>  (==) Log file: "/var/log/Xorg.0.log", Time: Wed Sep 30 17:46:35 2015
78c78
<  (--) using VT number 7
---
>  (++) using VT number 7
400,409d399
<  (II) modesetting(G0): EDID vendor "LGD", prod id 1103
<  (II) modesetting(G0): Printing DDC gathered Modelines:
<  (II) modesetting(G0): Modeline "1920x1080"x0.0  138.70  1920 1968 2000 2080  1080 1083 1088 1111 -hsync -vsync (66.7 kHz eP)
<  reporting 3 3 2 14
<  have a master to look out for
<  adjust shatters 0 640
<  need to create shared pixmap 1(II) modesetting(G0): EDID vendor "LGD", prod id 1103
<  (II) modesetting(G0): Printing DDC gathered Modelines:
<  (II) modesetting(G0): Modeline "1920x1080"x0.0  138.70  1920 1968 2000 2080  1080 1083 1088 1111 -hsync -vsync (66.7 kHz eP)
<  reporting 3 3 2 14

complete /var/log/Xorg.0.log after starting kmd:

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[  5198.395]
X.Org X Server 1.16.4
Release Date: 2014-12-20
[  5198.395] X Protocol Version 11, Revision 0
[  5198.395] Build Operating System: Linux 4.0.5-gentoo x86_64 Gentoo
[  5198.395] Current Operating System: Linux xen 4.0.5-gentoo #9 SMP Sun Sep 27 22:43:29 CEST 2015 x86_64
[  5198.395] Kernel command line: root=/dev/sda3
[  5198.395] Build Date: 27 September 2015  09:02:32PM
[  5198.395] 
[  5198.395] Current version of pixman: 0.32.6
[  5198.395]    Before reporting problems, check http://wiki.x.org
   to make sure that you have the latest version.
[  5198.395] Markers: (--) probed, (**) from config file, (==) default setting,
   (++) from command line, (!!) notice, (II) informational,
   (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[  5198.395] (==) Log file: "/var/log/Xorg.0.log", Time: Wed Sep 30 17:55:49 2015
[  5198.395] (==) Using config file: "/etc/X11/xorg.conf"
[  5198.395] (==) Using config directory: "/etc/X11/xorg.conf.d"
[  5198.395] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[  5198.395] (==) ServerLayout "Layout0"
[  5198.395] (**) |-->Screen "nvidia" (0)
[  5198.395] (**) |   |-->Monitor "Monitor0"
[  5198.396] (**) |   |-->Device "nvidia"
[  5198.396] (**) |-->Inactive Device "intel"
[  5198.396] (**) |-->Input Device "Keyboard0"
[  5198.396] (**) |-->Input Device "Mouse0"
[  5198.396] (==) Automatically adding devices
[  5198.396] (==) Automatically enabling devices
[  5198.396] (==) Automatically adding GPU devices
[  5198.396] (WW) The directory "/usr/share/fonts/TTF/" does not exist.
[  5198.396]    Entry deleted from font path.
[  5198.396] (WW) The directory "/usr/share/fonts/OTF/" does not exist.
[  5198.396]    Entry deleted from font path.
[  5198.396] (WW) The directory "/usr/share/fonts/Type1/" does not exist.
[  5198.396]    Entry deleted from font path.
[  5198.396] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/100dpi/".
[  5198.396]    Entry deleted from font path.
[  5198.396]    (Run 'mkfontdir' on "/usr/share/fonts/100dpi/").
[  5198.396] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/75dpi/".
[  5198.396]    Entry deleted from font path.
[  5198.396]    (Run 'mkfontdir' on "/usr/share/fonts/75dpi/").
[  5198.396] (==) FontPath set to:
   /usr/share/fonts/misc/
[  5198.396] (==) ModulePath set to "/usr/lib64/xorg/modules"
[  5198.396] (WW) Hotplugging is on, devices using drivers 'kbd', 'mouse' or 'vmmouse' will be disabled.
[  5198.396] (WW) Disabling Keyboard0
[  5198.396] (WW) Disabling Mouse0
[  5198.396] (II) Loader magic: 0x807c80
[  5198.396] (II) Module ABI versions:
[  5198.396]    X.Org ANSI C Emulation: 0.4
[  5198.396]    X.Org Video Driver: 18.0
[  5198.396]    X.Org XInput driver : 21.0
[  5198.396]    X.Org Server Extension : 8.0
[  5198.396] (II) xfree86: Adding drm device (/dev/dri/card1)
[  5198.396] (II) xfree86: Adding drm device (/dev/dri/card0)
[  5198.397] (--) PCI:*(0:0:2:0) 8086:0416:17aa:3978 rev 6, Mem @ 0xd1000000/4194304, 0xc0000000/268435456, I/O @ 0x00005000/64
[  5198.397] (--) PCI: (0:1:0:0) 10de:1392:17aa:3978 rev 162, Mem @ 0xd0000000/16777216, 0xa0000000/268435456, 0xb0000000/33554432, I/O @ 0x00004000/128, BIOS @ 0x????????/524288
[  5198.397] (II) LoadModule: "glx"
[  5198.397] (II) Loading /usr/lib64/xorg/modules/extensions/libglx.so
[  5198.400] (II) Module glx: vendor="NVIDIA Corporation"
[  5198.400]    compiled for 4.0.2, module version = 1.0.0
[  5198.400]    Module class: X.Org Server Extension
[  5198.400] (II) NVIDIA GLX Module  355.11  Wed Aug 26 16:02:11 PDT 2015
[  5198.400] (II) LoadModule: "nvidia"
[  5198.400] (II) Loading /usr/lib64/xorg/modules/drivers/nvidia_drv.so
[  5198.400] (II) Module nvidia: vendor="NVIDIA Corporation"
[  5198.400]    compiled for 4.0.2, module version = 1.0.0
[  5198.400]    Module class: X.Org Video Driver
[  5198.400] (II) LoadModule: "modesetting"
[  5198.400] (II) Loading /usr/lib64/xorg/modules/drivers/modesetting_drv.so
[  5198.400] (II) Module modesetting: vendor="X.Org Foundation"
[  5198.400]    compiled for 1.16.4, module version = 0.9.0
[  5198.400]    Module class: X.Org Video Driver
[  5198.400]    ABI class: X.Org Video Driver, version 18.0
[  5198.400] (II) NVIDIA dlloader X Driver  355.11  Wed Aug 26 15:38:55 PDT 2015
[  5198.400] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[  5198.400] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[  5198.400] (++) using VT number 7

[  5198.405] (II) Loading sub module "fb"
[  5198.405] (II) LoadModule: "fb"
[  5198.405] (II) Loading /usr/lib64/xorg/modules/libfb.so
[  5198.405] (II) Module fb: vendor="X.Org Foundation"
[  5198.405]    compiled for 1.16.4, module version = 1.0.0
[  5198.405]    ABI class: X.Org ANSI C Emulation, version 0.4
[  5198.405] (II) Loading sub module "wfb"
[  5198.405] (II) LoadModule: "wfb"
[  5198.405] (II) Loading /usr/lib64/xorg/modules/libwfb.so
[  5198.405] (II) Module wfb: vendor="X.Org Foundation"
[  5198.405]    compiled for 1.16.4, module version = 1.0.0
[  5198.405]    ABI class: X.Org ANSI C Emulation, version 0.4
[  5198.405] (II) Loading sub module "ramdac"
[  5198.405] (II) LoadModule: "ramdac"
[  5198.405] (II) Module "ramdac" already built-in
[  5198.405] (II) modesetting(1): using drv /dev/dri/card0
[  5198.405] (II) modesetting(G0): using drv /dev/dri/card0
[  5198.406] (EE) Screen 1 deleted because of no matching config section.
[  5198.406] (II) UnloadModule: "modesetting"
[  5198.406] (**) NVIDIA(0): Depth 24, (--) framebuffer bpp 32
[  5198.406] (==) NVIDIA(0): RGB weight 888
[  5198.406] (==) NVIDIA(0): Default visual is TrueColor
[  5198.406] (==) NVIDIA(0): Using gamma correction (1.0, 1.0, 1.0)
[  5198.406] (**) NVIDIA(0): Option "AllowEmptyInitialConfiguration"
[  5198.406] (**) NVIDIA(0): Enabling 2D acceleration
[  5198.532] (II) NVIDIA: Allocated GPU:0 (GPU-61835061-6584-1b19-016f-fe0cf96427ef) @
[  5198.532] (II) NVIDIA:     PCI:0000:01:00.0
[  5198.532] (II) NVIDIA: Freed GPU:0 (GPU-61835061-6584-1b19-016f-fe0cf96427ef) @
[  5198.532] (II) NVIDIA:     PCI:0000:01:00.0
[  5198.532] (II) NVIDIA(GPU-0): Found DRM driver nvidia-drm (20150116)
[  5198.534] (II) NVIDIA(0): NVIDIA GPU GeForce GTX 860M (GM107-A) at PCI:1:0:0 (GPU-0)
[  5198.534] (--) NVIDIA(0): Memory: 2097152 kBytes
[  5198.534] (--) NVIDIA(0): VideoBIOS: 82.07.34.00.08
[  5198.534] (II) NVIDIA(0): Detected PCI Express Link width: 16X
[  5198.534] (II) NVIDIA(0): Validated MetaModes:
[  5198.534] (II) NVIDIA(0):     "NULL"
[  5198.534] (II) NVIDIA(0): Virtual screen size determined to be 640 x 480
[  5198.534] (WW) NVIDIA(0): Unable to get display device for DPI computation.
[  5198.534] (==) NVIDIA(0): DPI set to (75, 75); computed from built-in default
[  5198.534] (**) modesetting(G0): Depth 24, (--) framebuffer bpp 32
[  5198.534] (==) modesetting(G0): RGB weight 888
[  5198.534] (==) modesetting(G0): Default visual is TrueColor
[  5198.534] (II) modesetting(G0): ShadowFB: preferred YES, enabled YES
[  5198.534] (II) modesetting(G0): Output eDP-1-0 using monitor section Monitor0
[  5198.534] (**) modesetting(G0): Option "PreferredMode" "1920x1080"
[  5198.550] (II) modesetting(G0): Output VGA-1-0 has no monitor section
[  5198.550] (II) modesetting(G0): Output HDMI-1-0 has no monitor section
[  5198.550] (II) modesetting(G0): EDID for output eDP-1-0
[  5198.550] (II) modesetting(G0): Manufacturer: LGD  Model: 44f  Serial#: 0
[  5198.550] (II) modesetting(G0): Year: 2014  Week: 0
[  5198.550] (II) modesetting(G0): EDID Version: 1.4
[  5198.550] (II) modesetting(G0): Digital Display Input
[  5198.550] (II) modesetting(G0): 6 bits per channel
[  5198.550] (II) modesetting(G0): Digital interface is DisplayPort
[  5198.550] (II) modesetting(G0): Max Image Size [cm]: horiz.: 35  vert.: 19
[  5198.550] (II) modesetting(G0): Gamma: 2.20
[  5198.550] (II) modesetting(G0): DPMS capabilities: StandBy Suspend Off
[  5198.550] (II) modesetting(G0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4
[  5198.550] (II) modesetting(G0): First detailed timing is preferred mode
[  5198.550] (II) modesetting(G0): Preferred mode is native pixel format and refresh rate
[  5198.550] (II) modesetting(G0): redX: 0.625 redY: 0.355   greenX: 0.335 greenY: 0.570
[  5198.550] (II) modesetting(G0): blueX: 0.151 blueY: 0.050   whiteX: 0.313 whiteY: 0.329
[  5198.550] (II) modesetting(G0): Manufacturer's mask: 0
[  5198.550] (II) modesetting(G0): Supported detailed timing:
[  5198.550] (II) modesetting(G0): clock: 138.7 MHz   Image Size:  345 x 194 mm
[  5198.550] (II) modesetting(G0): h_active: 1920  h_sync: 1968  h_sync_end 2000 h_blank_end 2080 h_border: 0
[  5198.550] (II) modesetting(G0): v_active: 1080  v_sync: 1083  v_sync_end 1088 v_blanking: 1111 v_border: 0
[  5198.550] (II) modesetting(G0):  LG Display
[  5198.550] (II) modesetting(G0):  LP156WF4-SPL1
[  5198.550] (II) modesetting(G0): EDID (in hex):
[  5198.550] (II) modesetting(G0):    00ffffffffffff0030e44f0400000000
[  5198.550] (II) modesetting(G0):    0018010495231378ea0cf5a05b559226
[  5198.550] (II) modesetting(G0):    0c505400000001010101010101010101
[  5198.550] (II) modesetting(G0):    0101010101012e3680a070381f403020
[  5198.550] (II) modesetting(G0):    350059c2100000190000000000000000
[  5198.550] (II) modesetting(G0):    00000000000000000000000000fe004c
[  5198.550] (II) modesetting(G0):    4720446973706c61790a2020000000fe
[  5198.550] (II) modesetting(G0):    004c503135365746342d53504c310013
[  5198.550] (II) modesetting(G0): Not using mode "1920x1080" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "800x600" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "400x300" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "800x600" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "400x300" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "1024x768" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "512x384" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "1280x960" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "640x480" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "1280x1024" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "640x512" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "800x600" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "896x672" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "928x696" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "960x720" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "1400x1050" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "700x525" (hsync out of range)
[  5198.550] (II) modesetting(G0): Not using default mode "1024x768" (hsync out of range)
[  5198.550] (II) modesetting(G0): Printing probed modes for output eDP-1-0
[  5198.550] (II) modesetting(G0): Modeline "640x480"x59.9   25.18  640 656 752 800  480 490 492 525 -hsync -vsync (31.5 kHz d)
[  5198.550] (II) modesetting(G0): Modeline "320x240"x60.1   12.59  320 328 376 400  240 245 246 262 doublescan -hsync -vsync (31.5 kHz d)
[  5198.566] (II) modesetting(G0): EDID for output VGA-1-0
[  5198.566] (II) modesetting(G0): EDID for output HDMI-1-0
[  5198.566] (II) modesetting(G0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated.
[  5198.566] (==) modesetting(G0): DPI set to (96, 96)
[  5198.566] (II) Loading sub module "fb"
[  5198.566] (II) LoadModule: "fb"
[  5198.566] (II) Loading /usr/lib64/xorg/modules/libfb.so
[  5198.566] (II) Module fb: vendor="X.Org Foundation"
[  5198.566]    compiled for 1.16.4, module version = 1.0.0
[  5198.566]    ABI class: X.Org ANSI C Emulation, version 0.4
[  5198.566] (II) Loading sub module "shadow"
[  5198.566] (II) LoadModule: "shadow"
[  5198.566] (II) Loading /usr/lib64/xorg/modules/libshadow.so
[  5198.566] (II) Module shadow: vendor="X.Org Foundation"
[  5198.566]    compiled for 1.16.4, module version = 1.1.0
[  5198.566]    ABI class: X.Org ANSI C Emulation, version 0.4
[  5198.566] (--) Depth 24 pixmap format is 32 bpp
[  5198.566] (==) modesetting(G0): Backing store enabled
[  5198.566] (==) modesetting(G0): Silken mouse enabled
[  5198.566] (II) modesetting(G0): RandR 1.2 enabled, ignore the following RandR disabled message.
[  5198.566] (**) modesetting(G0): DPMS enabled
[  5198.566] (WW) modesetting(G0): Option "PreferredMode" is not used
[  5198.566] (WW) modesetting(G0): Option "AllowEmptyInitialConfiguration" is not used
[  5198.832] (II) NVIDIA: Using 3072.00 MB of virtual memory for indirect memory
[  5198.832] (II) NVIDIA:     access.
[  5198.836] (II) NVIDIA(0): ACPI: failed to connect to the ACPI event daemon; the daemon
[  5198.836] (II) NVIDIA(0):     may not be running or the "AcpidSocketPath" X
[  5198.836] (II) NVIDIA(0):     configuration option may not be set correctly.  When the
[  5198.836] (II) NVIDIA(0):     ACPI event daemon is available, the NVIDIA X driver will
[  5198.836] (II) NVIDIA(0):     try to use it to receive ACPI event notifications.  For
[  5198.836] (II) NVIDIA(0):     details, please see the "ConnectToAcpid" and
[  5198.836] (II) NVIDIA(0):     "AcpidSocketPath" X configuration options in Appendix B: X
[  5198.836] (II) NVIDIA(0):     Config Options in the README.
[  5198.850] (II) NVIDIA(0): Built-in logo is bigger than the screen.
[  5198.851] (II) NVIDIA(0): Setting mode "NULL"
[  5198.855] (==) NVIDIA(0): Disabling shared memory pixmaps
[  5198.855] (==) NVIDIA(0): Backing store enabled
[  5198.855] (==) NVIDIA(0): Silken mouse enabled
[  5198.855] (**) NVIDIA(0): DPMS enabled
[  5198.855] (WW) NVIDIA(0): Option "PreferredMode" is not used
[  5198.855] (II) Loading sub module "dri2"
[  5198.855] (II) LoadModule: "dri2"
[  5198.855] (II) Module "dri2" already built-in
[  5198.855] (II) NVIDIA(0): [DRI2] Setup complete
[  5198.855] (II) NVIDIA(0): [DRI2]   VDPAU driver: nvidia
[  5198.855] (--) RandR disabled
[  5198.859] (II) Initializing extension GLX
[  5198.860] (II) modesetting(G0): Damage tracking initialized
[  5198.880] (II) config/udev: Adding input device Power Button (/dev/input/event3)
[  5198.880] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[  5198.880] (**) Power Button: Applying InputClass "Keyboard Defaults"
[  5198.880] (II) LoadModule: "evdev"
[  5198.880] (II) Loading /usr/lib64/xorg/modules/input/evdev_drv.so
[  5198.880] (II) Module evdev: vendor="X.Org Foundation"
[  5198.880]    compiled for 1.16.4, module version = 2.9.1
[  5198.880]    Module class: X.Org XInput Driver
[  5198.880]    ABI class: X.Org XInput driver, version 21.0
[  5198.880] (II) Using input driver 'evdev' for 'Power Button'
[  5198.880] (**) Power Button: always reports core events
[  5198.880] (**) evdev: Power Button: Device: "/dev/input/event3"
[  5198.881] (--) evdev: Power Button: Vendor 0 Product 0x1
[  5198.881] (--) evdev: Power Button: Found keys
[  5198.881] (II) evdev: Power Button: Configuring as keyboard
[  5198.881] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXPWRBN:00/input/input3/event3"
[  5198.881] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
[  5198.881] (**) Option "xkb_rules" "evdev"
[  5198.881] (**) Option "xkb_model" "pc104"
[  5198.881] (**) Option "xkb_layout" "us"
[  5198.881] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"
[  5198.894] (II) config/udev: Adding input device Video Bus (/dev/input/event5)
[  5198.894] (**) Video Bus: Applying InputClass "evdev keyboard catchall"
[  5198.894] (**) Video Bus: Applying InputClass "Keyboard Defaults"
[  5198.894] (II) Using input driver 'evdev' for 'Video Bus'
[  5198.894] (**) Video Bus: always reports core events
[  5198.894] (**) evdev: Video Bus: Device: "/dev/input/event5"
[  5198.894] (--) evdev: Video Bus: Vendor 0 Product 0x6
[  5198.894] (--) evdev: Video Bus: Found keys
[  5198.894] (II) evdev: Video Bus: Configuring as keyboard
[  5198.894] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:01/input/input5/event5"
[  5198.894] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
[  5198.894] (**) Option "xkb_rules" "evdev"
[  5198.894] (**) Option "xkb_model" "pc104"
[  5198.894] (**) Option "xkb_layout" "us"
[  5198.894] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"
[  5198.894] (II) config/udev: Adding input device Power Button (/dev/input/event0)
[  5198.894] (**) Power Button: Applying InputClass "evdev keyboard catchall"
[  5198.894] (**) Power Button: Applying InputClass "Keyboard Defaults"
[  5198.894] (II) Using input driver 'evdev' for 'Power Button'
[  5198.894] (**) Power Button: always reports core events
[  5198.894] (**) evdev: Power Button: Device: "/dev/input/event0"
[  5198.894] (--) evdev: Power Button: Vendor 0 Product 0x1
[  5198.894] (--) evdev: Power Button: Found keys
[  5198.894] (II) evdev: Power Button: Configuring as keyboard
[  5198.894] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:01/PNP0C0C:00/input/input0/event0"
[  5198.894] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 8)
[  5198.894] (**) Option "xkb_rules" "evdev"
[  5198.894] (**) Option "xkb_model" "pc104"
[  5198.894] (**) Option "xkb_layout" "us"
[  5198.894] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"
[  5198.894] (II) config/udev: Adding input device Sleep Button (/dev/input/event1)
[  5198.894] (**) Sleep Button: Applying InputClass "evdev keyboard catchall"
[  5198.894] (**) Sleep Button: Applying InputClass "Keyboard Defaults"
[  5198.894] (II) Using input driver 'evdev' for 'Sleep Button'
[  5198.894] (**) Sleep Button: always reports core events
[  5198.894] (**) evdev: Sleep Button: Device: "/dev/input/event1"
[  5198.894] (--) evdev: Sleep Button: Vendor 0 Product 0x3
[  5198.894] (--) evdev: Sleep Button: Found keys
[  5198.894] (II) evdev: Sleep Button: Configuring as keyboard
[  5198.894] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:01/PNP0C0E:00/input/input1/event1"
[  5198.895] (II) XINPUT: Adding extended input device "Sleep Button" (type: KEYBOARD, id 9)
[  5198.895] (**) Option "xkb_rules" "evdev"
[  5198.895] (**) Option "xkb_model" "pc104"
[  5198.895] (**) Option "xkb_layout" "us"
[  5198.895] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"
[  5198.895] (II) config/udev: Adding input device Video Bus (/dev/input/event4)
[  5198.895] (**) Video Bus: Applying InputClass "evdev keyboard catchall"
[  5198.895] (**) Video Bus: Applying InputClass "Keyboard Defaults"
[  5198.895] (II) Using input driver 'evdev' for 'Video Bus'
[  5198.895] (**) Video Bus: always reports core events
[  5198.895] (**) evdev: Video Bus: Device: "/dev/input/event4"
[  5198.895] (--) evdev: Video Bus: Vendor 0 Product 0x6
[  5198.895] (--) evdev: Video Bus: Found keys
[  5198.895] (II) evdev: Video Bus: Configuring as keyboard
[  5198.895] (**) Option "config_info" "udev:/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:43/LNXVIDEO:00/input/input4/event4"
[  5198.895] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 10)
[  5198.895] (**) Option "xkb_rules" "evdev"
[  5198.895] (**) Option "xkb_model" "pc104"
[  5198.895] (**) Option "xkb_layout" "us"
[  5198.895] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"
[  5198.895] (II) config/udev: Adding input device Lid Switch (/dev/input/event2)
[  5198.895] (II) No input driver specified, ignoring this device.
[  5198.895] (II) This device may have been added with another device file.
[  5198.895] (II) config/udev: Adding input device MOSART Semi. USB Device (/dev/input/event9)
[  5198.895] (**) MOSART Semi. USB Device: Applying InputClass "evdev pointer catchall"
[  5198.896] (II) Using input driver 'evdev' for 'MOSART Semi. USB Device'
[  5198.896] (**) MOSART Semi. USB Device: always reports core events
[  5198.896] (**) evdev: MOSART Semi. USB Device: Device: "/dev/input/event9"
[  5198.947] (--) evdev: MOSART Semi. USB Device: Vendor 0x62a Product 0x410c
[  5198.947] (--) evdev: MOSART Semi. USB Device: Found 12 mouse buttons
[  5198.947] (--) evdev: MOSART Semi. USB Device: Found scroll wheel(s)
[  5198.947] (--) evdev: MOSART Semi. USB Device: Found relative axes
[  5198.947] (--) evdev: MOSART Semi. USB Device: Found x and y relative axes
[  5198.947] (II) evdev: MOSART Semi. USB Device: Configuring as mouse
[  5198.947] (II) evdev: MOSART Semi. USB Device: Adding scrollwheel support
[  5198.947] (**) evdev: MOSART Semi. USB Device: YAxisMapping: buttons 4 and 5
[  5198.947] (**) evdev: MOSART Semi. USB Device: EmulateWheelButton: 4, EmulateWheelInertia: 10, EmulateWheelTimeout: 200
[  5198.947] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.1/2-1.1:1.0/0003:062A:410C.0001/input/input10/event9"
[  5198.947] (II) XINPUT: Adding extended input device "MOSART Semi. USB Device" (type: MOUSE, id 11)
[  5198.947] (II) evdev: MOSART Semi. USB Device: initialized for relative axes.
[  5198.947] (**) MOSART Semi. USB Device: (accel) keeping acceleration scheme 1
[  5198.947] (**) MOSART Semi. USB Device: (accel) acceleration profile 0
[  5198.947] (**) MOSART Semi. USB Device: (accel) acceleration factor: 2.000
[  5198.947] (**) MOSART Semi. USB Device: (accel) acceleration threshold: 4
[  5198.947] (II) config/udev: Adding input device MOSART Semi. USB Device (/dev/input/mouse1)
[  5198.947] (II) No input driver specified, ignoring this device.
[  5198.947] (II) This device may have been added with another device file.
[  5198.947] (II) config/udev: Adding input device Ideapad extra buttons (/dev/input/event7)
[  5198.947] (**) Ideapad extra buttons: Applying InputClass "evdev keyboard catchall"
[  5198.947] (**) Ideapad extra buttons: Applying InputClass "Keyboard Defaults"
[  5198.947] (II) Using input driver 'evdev' for 'Ideapad extra buttons'
[  5198.947] (**) Ideapad extra buttons: always reports core events
[  5198.947] (**) evdev: Ideapad extra buttons: Device: "/dev/input/event7"
[  5198.947] (--) evdev: Ideapad extra buttons: Vendor 0 Product 0
[  5198.947] (--) evdev: Ideapad extra buttons: Found keys
[  5198.947] (II) evdev: Ideapad extra buttons: Configuring as keyboard
[  5198.947] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/input/input9/event7"
[  5198.947] (II) XINPUT: Adding extended input device "Ideapad extra buttons" (type: KEYBOARD, id 12)
[  5198.947] (**) Option "xkb_rules" "evdev"
[  5198.947] (**) Option "xkb_model" "pc104"
[  5198.947] (**) Option "xkb_layout" "us"
[  5198.947] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"
[  5198.948] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event6)
[  5198.948] (**) AT Translated Set 2 keyboard: Applying InputClass "evdev keyboard catchall"
[  5198.948] (**) AT Translated Set 2 keyboard: Applying InputClass "Keyboard Defaults"
[  5198.948] (II) Using input driver 'evdev' for 'AT Translated Set 2 keyboard'
[  5198.948] (**) AT Translated Set 2 keyboard: always reports core events
[  5198.948] (**) evdev: AT Translated Set 2 keyboard: Device: "/dev/input/event6"
[  5198.948] (--) evdev: AT Translated Set 2 keyboard: Vendor 0x1 Product 0x1
[  5198.948] (--) evdev: AT Translated Set 2 keyboard: Found keys
[  5198.948] (II) evdev: AT Translated Set 2 keyboard: Configuring as keyboard
[  5198.948] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio0/input/input6/event6"
[  5198.948] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 13)
[  5198.948] (**) Option "xkb_rules" "evdev"
[  5198.948] (**) Option "xkb_model" "pc104"
[  5198.948] (**) Option "xkb_layout" "us"
[  5198.948] (**) Option "xkb_options" "terminate:ctrl_alt_bksp"
[  5198.948] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/event8)
[  5198.948] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "evdev touchpad catchall"
[  5198.948] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "touchpad catchall"
[  5198.948] (**) SynPS/2 Synaptics TouchPad: Applying InputClass "Default clickpad buttons"
[  5198.948] (II) LoadModule: "synaptics"
[  5198.948] (II) Loading /usr/lib64/xorg/modules/input/synaptics_drv.so
[  5198.948] (II) Module synaptics: vendor="X.Org Foundation"
[  5198.948]    compiled for 1.16.4, module version = 1.8.1
[  5198.948]    Module class: X.Org XInput Driver
[  5198.948]    ABI class: X.Org XInput driver, version 21.0
[  5198.948] (II) Using input driver 'synaptics' for 'SynPS/2 Synaptics TouchPad'
[  5198.948] (**) SynPS/2 Synaptics TouchPad: always reports core events
[  5198.948] (**) Option "Device" "/dev/input/event8"
[  5198.973] (II) synaptics: SynPS/2 Synaptics TouchPad: found clickpad property
[  5198.973] (--) synaptics: SynPS/2 Synaptics TouchPad: x-axis range 1278 - 5664 (res 42)
[  5198.973] (--) synaptics: SynPS/2 Synaptics TouchPad: y-axis range 1228 - 4678 (res 51)
[  5198.973] (--) synaptics: SynPS/2 Synaptics TouchPad: pressure range 0 - 255
[  5198.973] (--) synaptics: SynPS/2 Synaptics TouchPad: finger width range 0 - 15
[  5198.973] (--) synaptics: SynPS/2 Synaptics TouchPad: buttons: left double triple
[  5198.973] (--) synaptics: SynPS/2 Synaptics TouchPad: Vendor 0x2 Product 0x7
[  5198.973] (**) Option "SoftButtonAreas" "50% 0 82% 0 0 0 0 0"
[  5198.973] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[  5198.973] (**) SynPS/2 Synaptics TouchPad: always reports core events
[  5198.985] (**) Option "config_info" "udev:/sys/devices/platform/i8042/serio1/input/input8/event8"
[  5198.985] (II) XINPUT: Adding extended input device "SynPS/2 Synaptics TouchPad" (type: TOUCHPAD, id 14)
[  5198.985] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MinSpeed is now constant deceleration 2.5
[  5198.985] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) MaxSpeed is now 1.75
[  5198.985] (**) synaptics: SynPS/2 Synaptics TouchPad: (accel) AccelFactor is now 0.036
[  5198.985] (**) SynPS/2 Synaptics TouchPad: (accel) keeping acceleration scheme 1
[  5198.985] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration profile 1
[  5198.985] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration factor: 2.000
[  5198.985] (**) SynPS/2 Synaptics TouchPad: (accel) acceleration threshold: 4
[  5198.985] (--) synaptics: SynPS/2 Synaptics TouchPad: touchpad found
[  5198.985] (II) config/udev: Adding input device SynPS/2 Synaptics TouchPad (/dev/input/mouse0)
[  5198.985] (**) SynPS/2 Synaptics TouchPad: Ignoring device from InputClass "touchpad ignore duplicates"

Seems you encounter
https://devtalk.nvidia.com/default/topi ... -on-linux/

Short answer: disable the intel IGP in BIOS (if possible) or install & use bumblebee.
The xrandr calls mentioned in the nvidia link *may* work, afair kdm had the relevant include in /etc/kde4/kdm/Xsetup (ie. add them there)

luebking wrote:Seems you encounter
https://devtalk.nvidia.com/default/topi ... -on-linux/

Short answer: disable the intel IGP in BIOS (if possible) or install & use bumblebee.
The xrandr calls mentioned in the nvidia link *may* work, afair kdm had the relevant include in /etc/kde4/kdm/Xsetup (ie. add them there)

Thanks for reply, yeah I know about these xrandr commands -- given that the x server started via startx seems working fine I thought that the problem was somewhere else, thats why I didn't mentioned earlier.

May I just ask one more question (I'm sorry if this is stupid one)? How come that startx works fine, but starting via kdm is broken?