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Old 09-23-2009, 12:53 PM   #1
mcnalu
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intel dualhead >2048 with DRI!


In case this helps someone else...

When I switched from 12.1 to 13.0 for everyday use, the only real pain was that my dualhead monitor setup no longer worked. I really need this for work and back when I installed slack 12.1 I got a good solution with xrandr for spanning across internal+external 19" monitors as described clearly here.

intel pre-i965 (mine is 945gme) won't do dri if the Virtual in xorg.conf is set greater than 2048, but my width is 1440+900>2048. In slack 12.1 I just turned dri off with an option in xorg.conf and the problem was solved - don't play games at work

But, in slack 13.0 the new xorg seems to ignore all requests to turn off dri and so I couldn't get past the >2048 issue with xrandr. When I finally did manage to clobber dri (Disable "glx" did it I think), I had terrible graphics performance and still got the >2048 error from xrandr! Seems a partial explanation can be found here.

Trying to use Xinerama in the xorg.conf (which was my solution back in slack 11 days) resulted in a complete crash on starting X - not an EE in the log, a full on crash.

Early on I'd come across this page and the second solution it described didn't make sense to me, so I had ignored it. But, since nothing else worked, I copied and pasted it into my xorg.conf and bingo! I now have dualhead with a width of 1440+900 and I also have dri, which I thought wasn't possible on this intel chipset with width>2048!
 
Old 09-30-2009, 05:46 PM   #2
Bruce Hill
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Why don't you post this to our Linux Tutorials
 
Old 10-01-2009, 10:38 AM   #3
mcnalu
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Quote:
Originally Posted by Bruce Hill View Post
Why don't you post this to our Linux Tutorials
Good idea - tis done.
 
Old 11-16-2009, 06:36 AM   #4
eadward
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Registered: Nov 2009
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Hi,
I have the same problem, but the proposed solution didn't work for me. I searched for the posted tutorial and couldn't find it. So, can you post the fixed xorg.conf?

Many thanks in advance

EDIT: I have an i855 (works with the i810 driver). With a dri-accepted resolution the acceleration works fine, but I'd want to work fine with a virtual screen of 3300x1050 (two 22" screens).

Last edited by eadward; 11-16-2009 at 07:04 AM.
 
  


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