Arch Linux

dbacc

Member

Registered: 2014-09-25

Posts: 120

Nvidia Optimus DualView with T420. Wrong resolutions.

Hey,

I'm trying to get to work my DualView + nvidia optimus setting on a T420 +dock .

I followed http://www.unixreich.com/blog/2013/linu … ly-solved/ and it works fine.
The screen attached to the dvi-port at my dock turns on and I can configure it with kde.

Unfortunately, if I change the resolution to FHD I don't get the desired results. The resolution of my second screen is somehow stuck to the resolution of my internal screen ( so has a height of 768) with the effect, that windows get cut off at the bottom edge.
Here is a output of xrandr:

xrandr                
Screen 0: minimum 8 x 8, current 2390 x 768, maximum 32767 x 32767
LVDS1 connected 1366x768+1024+0 (normal left inverted right x axis y axis) 309mm x 173mm
   1366x768      60.10*+
   1024x768      60.00  
   800x600       60.32    56.25  
   640x480       59.94  
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
VIRTUAL2 disconnected (normal left inverted right x axis y axis)
VIRTUAL3 disconnected (normal left inverted right x axis y axis)
VIRTUAL4 disconnected (normal left inverted right x axis y axis)
VIRTUAL5 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   VIRTUAL5.641-1920x1080  60.00  
   VIRTUAL5.642-1920x1080  50.00  
   VIRTUAL5.643-1680x1050  59.95  
   VIRTUAL5.644-1600x1200  60.00  
   VIRTUAL5.645-1440x900  59.89  
   VIRTUAL5.646-1280x1024  75.02  
   VIRTUAL5.647-1280x1024  60.02  
   VIRTUAL5.648-1280x960  60.00  
   VIRTUAL5.649-1280x800  59.81  
   VIRTUAL5.650-1280x720  60.00  
   VIRTUAL5.651-1280x720  50.00  
   VIRTUAL5.652-1152x864  75.00  
   VIRTUAL5.653-1024x768  75.03  
   VIRTUAL5.654-1024x768  70.07  
   1024x768      60.00* 
   VIRTUAL5.656-800x600  75.00  
   VIRTUAL5.657-800x600  72.19  
   800x600       60.32    56.25  
   VIRTUAL5.660-720x576  50.00  
   VIRTUAL5.661-720x480  59.94  
   VIRTUAL5.662-640x480  75.00  
   VIRTUAL5.663-640x480  72.81  
   640x480       59.94  
VIRTUAL6 disconnected (normal left inverted right x axis y axis)
VIRTUAL7 disconnected (normal left inverted right x axis y axis)
VIRTUAL8 disconnected (normal left inverted right x axis y axis)
VIRTUAL9 disconnected (normal left inverted right x axis y axis)

Can you help me on fixing this? I've no idea where I could dig in.

dbacc

Member

Registered: 2014-09-25

Posts: 120

Re: Nvidia Optimus DualView with T420. Wrong resolutions.

Hey,

I installed Gnome in order to check if this makes any difference.
However, there everything works fine!

So it must have something to do with KDE, right? Any more ideas?