xrandr doesn’t detect display ports

Posted by Psyhister on Super User See other posts from Super User or by Psyhister
Published on 2012-11-27T02:42:16Z Indexed on 2012/11/27 5:10 UTC
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Troubleshooting

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gentoo

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displayport

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xrandr

I have a ThinkPad T510 laptop with Gentoo Linux installed on it and I can’t manage to get VGA and DisplayPort working. xrandr -q won’t show them, so I’m guessing, that there’s a problem with my kernel configuration, but I wasn’t able to find the options responsible for these ports. Here’s the output from xrandr -q:

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 320 x 175, current 1366 x 768, maximum 1366 x 768
default connected 1366x768+0+0 0mm x 0mm
   1366x768       50.0*    51.0     52.0  
   1024x768       53.0     54.0  
   832x624        55.0  
   800x600        56.0     57.0     58.0     59.0     60.0  
   720x400        61.0  
   700x525        62.0  
   640x512        63.0     64.0  
   640x480        65.0     66.0     67.0     68.0     69.0  
   640x400        70.0  
   640x350        71.0  
   576x432        72.0  
   512x384        73.0     74.0     75.0     76.0     77.0  
   416x312        78.0  
   400x300        79.0     80.0     81.0     82.0     83.0  
   360x200        84.0  
   320x240        85.0     86.0     87.0     88.0  
   320x200        89.0  
   320x175        90.0

Can anyone help me figure out what the problem is and how to get the video connections to work?

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