Registered Member
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Hi,
I have now Kubuntu 13.04 installed on my XPS13, and plugged in an external screen. The mini-display port+DVI cable works and my external screen does duplicate my 1920x1080 laptop screen. However in KDE I only see ONE screen with just that resolution and it is labelled "default". I cannot change the resolution of the external screen through the kcm_screen tool at all. Since my external monitor is 1920x1200 and not 1920x1080 (which is my laptop screen resolution), the bottom of the external monitor is black. How can I set this up right with KDE? (KDE dev platform 4.10.2, Qt 4.8.4) Note: doing xrandr I only get one Screen 0 with defaut connected to 1920x1080 (and Screen0 has a maximum of 1920x1080). thanks! |
Administrator
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If you see an option to "Unify Displays" try unchecking that. Otherwise - what graphics card are you using? It doesn't seem to recognise that output as a separate connection.
KDE Sysadmin
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Registered Member
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This is an XPS13, which has an Intel HD 4000 card I think. I do not see any Unify Screen option anywhere. Looks like it is a single screen labelled "default".
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Administrator
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Okay, this is quite unusual.
Which graphics card does your system have? Also, please post the output of "xrandr"
KDE Sysadmin
[img]content/bcooksley_sig.png[/img] |
Registered Member
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Thanks.
As mentioned, this is an Intel HD4000 card on a XPS13. xrandr provides the following: xrandr: Failed to get size of gamma for output default Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x 1080 default connected 1920x1080+0+0 0mm x 0mm 1920x1080 0.0* This is basically what I see even when an external monitor is connected. |
Administrator
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This is extremely odd behaviour for the Intel driver - and is not normal. I can think of two possible options:
1) The Intel driver is not being used, and a fallback such as the framebuffer driver is allowing it to function. 2) The Intel driver is being used, but is too old for the Intel card you have and as a result has very limited support. Please provide the output of the following command:
KDE Sysadmin
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Registered Member
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Hi
sorry for the silence : I was away for some time. Still no luck (and same result when connecting to a beamer, only a "default" screen and no resolution change possible). Here is the output you asked for. Hope this helps because at this stage I have no clue what to do :
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Administrator
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It seems your system is using XRender compositing. Are you able to switch to OpenGL?
Also, can you please provide the output of the following command?
KDE Sysadmin
[img]content/bcooksley_sig.png[/img] |
Registered Member
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How do I know if I can switch to openGL?
This is it (I hope the VMware is not related to the fact that I am running a VMware player, although running it or not does make no difference): OpenGL vendor string: VMware, Inc. OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.2, 256 bits) OpenGL version string: 2.1 Mesa 9.1.3 OpenGL shading language version string: 1.20 OpenGL extensions: |
Administrator
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Okay, as you are running through VMWare, KDE does not have physical hardware access - it only has access to the virtual hardware. This means you need to adjust the configuration of VMWare to use the appropriate matching resolutions, as KDE has no control over it.
KDE Sysadmin
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Registered Member
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Hi
thanks but to clarify: I am NOT running Kubuntu under VMWare! I am running a bona fide 13.04 installed from scratch. However, I did install a VMware player to run Windows under ubuntu which I use once in a while (but seldom). So I am not sure I understand what happens with this and why WMware is mentioned when I do glxinfo. For consistency, I include here the full output of glxinfo. And I made sure vmplayer is not running right now. thanks
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Administrator
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That shows that your system is using llvmpipe - which explains why you are able to use XRender based compositing.
Can you post the output of this command please?
KDE Sysadmin
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Registered Member
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yes:
lspci -k
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Administrator
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Hmm, that indicates the proper Intel kernel driver is being used.
That means the problem can only be in X itself. Can you review the contents of your /var/log/Xorg.0.log file, to see if it is having problems loading the Intel driver?
KDE Sysadmin
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Registered Member
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thanks.
Well hard for me to tell (with my knowledge of Xorg etc). See at the bottom of this post an excerpt from the Xorg log. There are lots of "[ 8.038] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument " and at the end of that long series of Invalid arguments:
(Note that connecting to a beamer, I also only get a default screen with the same resolution as my laptop screen, and no option to tune it. For some reason it does send the signal to the screen but does not see it as different from the laptop screen - hope what I write here makes sense) here is more of the Xorg.log
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