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Old 12-15-2013, 02:37 PM   #1
yooden
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X11 does not detect multiple screens


Hi,

I just installed Debian Jessie on my workstation, but I have several problems running X11.

I use two screen (different resolutions) and just want to run my desktop across both, nothing fancy. X11 does not detect them by itself, and my old xorg.conf causes a segfault. When I run Xorg -configure, it ends with an error:
Code:
Number of created screens does not match the number of devices
Debian Jessie from 2013-12-14, xorg 7.7+4. I have a Matrox G550 which usually works fine in Xinerama mode. According to the log, the driver is detected correctly by X11.

I googled around, but couldn't find anything that helps; do you have any hints about search terms? Do you need any other information from me?

How can I get X11 running on both screens?

(See here for another problem I have.)

Thanks!

Cheers,
yooden

Last edited by yooden; 12-15-2013 at 02:46 PM.
 
Old 12-15-2013, 06:46 PM   #2
ondoho
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type "xrandr" in a terminal and post the output here.
 
Old 12-16-2013, 12:55 AM   #3
yooden
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Quote:
Originally Posted by ondoho View Post
type "xrandr" in a terminal and post the output here.
Code:
# xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 400 x 300, current 1920 x 1200, maximum 1920 x 1200
default connected 1920x1200+0+0 0mm x 0mm
   1920x1200      60.0* 
   1600x1200      75.0     60.0     70.0     65.0  
   1680x1050      60.0     75.0     70.0  
   1400x1050      75.0     70.0     60.0  
   1280x1024      75.0     60.0  
   1440x900       60.0  
   1280x960       60.0  
   1360x768       60.0  
   1152x864       75.0     70.0     60.0  
   1024x768       75.0     70.0     60.0  
   960x720        60.0  
   928x696        60.0  
   896x672        60.0  
   832x624        75.0  
   800x600        75.0     72.0     60.0     56.0     70.0     65.0  
   840x525        75.0     70.0     60.0  
   700x525        75.0     70.0     60.0  
   640x512        75.0     60.0  
   720x450        60.0  
   640x480        75.0     73.0     60.0  
   720x400        70.0  
   680x384        60.0  
   576x432        75.0     70.0     60.0  
   512x384        75.0     70.0     60.0  
   416x312        75.0  
   400x300        75.0     72.0     60.0     56.0
 
Old 12-16-2013, 02:35 PM   #4
ondoho
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ok, it indeed does not detect your second screen.

please see my latest post in your other thread.
 
Old 01-20-2014, 04:22 PM   #5
yooden
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(Holidays and other stuff prevented a prompt response.)

As you adviced, I switched back to Wheezy, but I see exactly the same problem.

Meanwhile, I found Arandr, which is very useful on my notebook, but (as the xrandr output indicates) fails to detect the second port.

Is there another way to get closer to a solution?
 
Old 02-04-2014, 01:44 AM   #6
ondoho
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i guess this problem is seperate from your other thread...
i just found this:
http://www.linuxjournal.com/article/4817
it's really old and probably contains outdated info and some of it can probably be done with a simple gui these days, but then so is your graphic card.

https://wiki.archlinux.org/index.php/Xorg
arch wiki often has precious information even for non-arch users!

i didn't really delve into either of those 2 topics, but maybe you will.
 
Old 02-04-2014, 12:31 PM   #7
yooden
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Good links, esp. the one to the ArchWiki, thanks!

I tried to get the Matrox running with a hand-woven config, but that wouldn't get rid of the slowness (see other thread). So at the moment I try to get rid of both problems with a new GCA.
 
  


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