Hi all,

First off, thank you. Thanks to all the KDE community for putting such effort into this distribution. It has taken away all the pain that upgrades in Fedora has given me for the past few years

One thing that I noticed shortly after installing KDE Neon onto my laptop is that on my home display (LG 25UM57-P[1]) which is supposed to run on a resolution of 2560x1080 the option to select such this resolution is not available in the "Displays" section of KDE. The maximum one is 1920x1080, which corresponds to the output from xrandr:

Code: Select all

Screen 0: minimum 320 x 200, current 3840 x 1168, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+1920+88 (normal left inverted right x axis y axis) 309mm x 173mm
   1920x1080     60.05*+  59.93 
   1680x1050     59.95    59.88 
   1600x1024     60.17 
   1400x1050     59.98 
   1280x1024     60.02 
   1440x900      59.89 
   1280x960      60.00 
   1360x768      59.80    59.96 
   1152x864      60.00 
   1024x768      60.04    60.00 
   960x720       60.00 
   928x696       60.05 
   896x672       60.01 
   960x600       60.00 
   960x540       59.99 
   800x600       60.00    60.32    56.25 
   840x525       60.01    59.88 
   800x512       60.17 
   700x525       59.98 
   640x512       60.02 
   720x450       59.89 
   640x480       60.00    59.94 
   680x384       59.80    59.96 
   576x432       60.06 
   512x384       60.00 
   400x300       60.32    56.34 
   320x240       60.05 
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 798mm x 334mm
   1920x1080     60.00*   50.00    59.94    30.00    29.97 
   1920x1080i    60.00    50.00    59.94 
   1680x1050     59.88 
   1600x900      60.00 
   1280x1024     75.02    60.02 
   1152x864      75.00 
   1280x720      60.00    50.00    59.94 
   1024x768      75.03    60.00 
   800x600       75.00    60.32 
   720x576       50.00 
   720x480       60.00    59.94 
   640x480       75.00    60.00    59.94 
   720x400       70.08 
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)

My laptop has an Intel graphics card so I thought installing xserver-xorg-video-intel would be a good idea, however the dependencies seem broken:

Code: Select all

Reading package lists...
Building dependency tree...
Reading state information...
Starting pkgProblemResolver with broken count: 13
Starting 2 pkgProblemResolver with broken count: 13
Investigating (0) xserver-xorg-video-intel-native-modesetting [ amd64 ] < 0+p16.04+git20170210.1114 > ( misc )
Broken xserver-xorg-video-intel-native-modesetting:amd64 Conflicts on xserver-xorg-video-intel [ amd64 ] < none -> 2:2.99.917+git20160325-1ubuntu1.2 > ( x11 )
  Considering xserver-xorg-video-intel:amd64 10001 as a solution to xserver-xorg-video-intel-native-modesetting:amd64 7
  Removing xserver-xorg-video-intel-native-modesetting:amd64 rather than change xserver-xorg-video-intel:amd64
Investigating (0) xserver-xorg-video-qxl-hwe-16.04 [ amd64 ] < 0.1.5-2build1~16.04.1 > ( x11 )
Broken xserver-xorg-video-qxl-hwe-16.04:amd64 Depends on xorg-video-abi-23 [ amd64 ] < none ->  > ( none )
  Considering xserver-xorg-core-hwe-16.04:amd64 0 as a solution to xserver-xorg-video-qxl-hwe-16.04:amd64 2
  Added xserver-xorg-core-hwe-16.04:amd64 to the remove list
Broken xserver-xorg-video-qxl-hwe-16.04:amd64 Depends on xserver-xorg-core-hwe-16.04 [ amd64 ] < 2:1.19.3-1ubuntu1~16.04.2 > ( x11 ) (>= 2:1.18.99.901)
  Considering xserver-xorg-core-hwe-16.04:amd64 0 as a solution to xserver-xorg-video-qxl-hwe-16.04:amd64 2
  Added xserver-xorg-core-hwe-16.04:amd64 to the remove list
  Fixing xserver-xorg-video-qxl-hwe-16.04:amd64 via keep of xserver-xorg-core-hwe-16.04:amd64
  Fixing xserver-xorg-video-qxl-hwe-16.04:amd64 via keep of xserver-xorg-core-hwe-16.04:amd64
Investigating (0) xserver-xorg-core-hwe-16.04 [ amd64 ] < 2:1.19.3-1ubuntu1~16.04.2 > ( x11 )
Broken xserver-xorg-core-hwe-16.04:amd64 Conflicts on xserver-xorg-core [ amd64 ] < none -> 2:1.18.4-0ubuntu0.3 > ( x11 )
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-core-hwe-16.04:amd64 0
  Added xserver-xorg-core:amd64 to the remove list
  Conflicts//Breaks against version 2:1.18.3-1ubuntu2 for xserver-xorg-core but that is not InstVer, ignoring
Broken xserver-xorg-core-hwe-16.04:amd64 Conflicts on xserver-xorg-video-modesetting [ amd64 ] < none ->  > ( none )
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-core-hwe-16.04:amd64 0
  Added xserver-xorg-core:amd64 to the remove list
  Conflicts//Breaks against version 2:1.18.3-1ubuntu2 for xserver-xorg-core but that is not InstVer, ignoring
  Fixing xserver-xorg-core-hwe-16.04:amd64 via keep of xserver-xorg-core:amd64
  Fixing xserver-xorg-core-hwe-16.04:amd64 via keep of xserver-xorg-core:amd64
Investigating (1) xserver-xorg-video-intel [ amd64 ] < none -> 2:2.99.917+git20160325-1ubuntu1.2 > ( x11 )
Broken xserver-xorg-video-intel:amd64 Depends on xorg-video-abi-20 [ amd64 ] < none ->  > ( none )
  Considering xserver-xorg-core-hwe-16.04:amd64 0 as a solution to xserver-xorg-video-intel:amd64 10001
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-video-intel:amd64 10001
  Re-Instated xserver-xorg-core:amd64
Investigating (1) xserver-xorg-core-hwe-16.04 [ amd64 ] < 2:1.19.3-1ubuntu1~16.04.2 > ( x11 )
Broken xserver-xorg-core-hwe-16.04:amd64 Conflicts on xserver-xorg-core [ amd64 ] < none -> 2:1.18.4-0ubuntu0.3 > ( x11 )
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-core-hwe-16.04:amd64 0
  Added xserver-xorg-core:amd64 to the remove list
  Conflicts//Breaks against version 2:1.18.3-1ubuntu2 for xserver-xorg-core but that is not InstVer, ignoring
Broken xserver-xorg-core-hwe-16.04:amd64 Conflicts on xserver-xorg-video-modesetting [ amd64 ] < none ->  > ( none )
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-core-hwe-16.04:amd64 0
  Added xserver-xorg-core:amd64 to the remove list
  Conflicts//Breaks against version 2:1.18.3-1ubuntu2 for xserver-xorg-core but that is not InstVer, ignoring
  Fixing xserver-xorg-core-hwe-16.04:amd64 via keep of xserver-xorg-core:amd64
  Fixing xserver-xorg-core-hwe-16.04:amd64 via keep of xserver-xorg-core:amd64
Investigating (2) xserver-xorg-video-intel [ amd64 ] < none -> 2:2.99.917+git20160325-1ubuntu1.2 > ( x11 )
Broken xserver-xorg-video-intel:amd64 Depends on xorg-video-abi-20 [ amd64 ] < none ->  > ( none )
  Considering xserver-xorg-core-hwe-16.04:amd64 0 as a solution to xserver-xorg-video-intel:amd64 10001
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-video-intel:amd64 10001
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-video-intel:amd64 10001
Broken xserver-xorg-video-intel:amd64 Depends on xserver-xorg-core [ amd64 ] < none -> 2:1.18.4-0ubuntu0.3 > ( x11 ) (>= 2:1.17.99.902)
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-video-intel:amd64 10001
  Considering xserver-xorg-core:amd64 -1 as a solution to xserver-xorg-video-intel:amd64 10001
Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 xserver-xorg-video-intel : Depends: xorg-video-abi-20
                            Depends: xserver-xorg-core (>= 2:1.17.99.902)
E: Unable to correct problems, you have held broken packages.

Any tips on how to proceed here?

Cheers,
-Alejandro

[1]: https://www.amazon.es/gp/product/B00UD0 ... UTF8&psc=1

A)

I would do 2 things:

1.) Disconnect external Monitors and repeat xrandr.
Are there any changes in the list of resolutions?

2.) Install twm or cwm and do Your xrandr-tests from there.
Because: The KDE Desktop changes/blocks/overrides the
behaviour of xrandr.

That's not a bad thing. But if You want to know, what's going on,
use a terminal window from within a minimal Window Manager (twm, cwm).
You can even do testing with a terminal window without window manager.
Details to be found in "man xinit".

B)
Even if Your wanted resolution does not appear in the xrandr list:
You could enter it as an xrandr option, nonetheless.
Simply do it and see what happens.

NoNameNoBlame wrote:A)

I would do 2 things:

1.) Disconnect external Monitors and repeat xrandr.
Are there any changes in the list of resolutions?

2.) Install twm or cwm and do Your xrandr-tests from there.
Because: The KDE Desktop changes/blocks/overrides the
behaviour of xrandr.

That's not a bad thing. But if You want to know, what's going on,
use a terminal window from within a minimal Window Manager (twm, cwm).
You can even do testing with a terminal window without window manager.
Details to be found in "man xinit".

B)
Even if Your wanted resolution does not appear in the xrandr list:
You could enter it as an xrandr option, nonetheless.
Simply do it and see what happens.

Option B worked like a charm. Thanks a lot! In case this happens to anybody else:

Code: Select all

alejandro@alejandro-ThinkPad-T440s:~$ cvt 2560 1080 60
# 2560x1080 59.98 Hz (CVT) hsync: 67.17 kHz; pclk: 230.00 MHz
Modeline "2560x1080_60.00"  230.00  2560 2720 2992 3424  1080 1083 1093 1120 -hsync +vsync
alejandro@alejandro-ThinkPad-T440s:~$ sudo xrandr --newmode "2560x1080_60.00" 230.00  2560 2720 2992 3424  1080 1083 1093 1120 -hsync +vsync
alejandro@alejandro-ThinkPad-T440s:~$ sudo xrandr --addmode HDMI-1 2560x1080_60.00

Then I was able to select it via the KDE "Displays" menu.