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lude
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PostPosted: Thu Feb 25, 2010 5:28 pm    Post subject: xorg + nvidia + xinerama = segfault Reply with quote

Been trying to work around this one for a while now, finally at my wit's end. I have a 4 monitor setup:

01:00.0 VGA compatible controller: nVidia Corporation NV42 [GeForce 6800 XT] (rev a2)
02:00.0 VGA compatible controller: nVidia Corporation G86 [Quadro NVS 290] (rev a1)

Each drives two monitors. Right now the only thing I can get working is setting the two up to do twinview across their respective cards, and having two separate X displays. This annoys me as I can't drag things to the upper set of monitors from the lower set.

If I enable Xinerama in xorg.conf, any application set up to load, immediately crashes. Here's an example just trying to run xterm:
(gdb) bt
#0 0x00007f0e927c3550 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#1 0x00000000004192bd in ?? ()
#2 0x00007f0e9232be79 in ?? () from /usr/lib/libXt.so.6
#3 0x00007f0e9232c925 in ?? () from /usr/lib/libXt.so.6
#4 0x00007f0e9232d2d8 in _XtCreateWidget () from /usr/lib/libXt.so.6
#5 0x00007f0e9235d379 in ?? () from /usr/lib/libXt.so.6
#6 0x00007f0e9235d5a4 in XtVaCreateManagedWidget () from /usr/lib/libXt.so.6
#7 0x00000000004256d1 in ?? ()
#8 0x00007f0e92d1bba6 in __libc_start_main () from /lib/libc.so.6
#9 0x0000000000407aa9 in ?? ()
#10 0x00007fff5f1a4ba8 in ?? ()
#11 0x000000000000001c in ?? ()
#12 0x0000000000000001 in ?? ()
#13 0x00007fff5f1a552a in ?? ()

If i set Xinerama "1" in xorg.conf the above happens, if I set it "0" everything works flawlessly. Any ideas?
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krinn
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Joined: 02 May 2003
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PostPosted: Fri Feb 26, 2010 11:15 pm    Post subject: Reply with quote

http://www.nvnews.net/vbulletin/showthread.php?t=63661

bunch of xorg configuration in the zip file.
Might help.
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lude
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Joined: 18 Apr 2002
Posts: 114
Location: New York, NY

PostPosted: Mon Mar 01, 2010 8:38 pm    Post subject: Reply with quote

Yeah I'm thinking it used to work with an older version of Xorg, and with their changeover to the new xrandr stuff, something got broke.
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Flow__
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Joined: 10 Jul 2007
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PostPosted: Thu Aug 26, 2010 2:34 pm    Post subject: Reply with quote

I have nearly the same problem. The first process that X starts segfaults, when xinerama is enabled:
kernel: gdm[5697]: segfault at 8 ip 00007fc778286634 sp 00007fff5b4b60e0 error 4 in libgdk-x11-2.0.so.0.2000.1[7fc77821c000+a8000]
gdmgreeter[5747]: segfault at 8 ip 00007f3982ebc634 sp 00007fffe6e7d450 error 4 in libgdk-x11-2.0.so.0.2000.1[7f3982e52000+a8000]

Also nvidia driver:
05:02.0 VGA compatible controller: nVidia Corporation NV44A [GeForce 6200] (rev a1)
01:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce 9800 GTX] (rev a2)

xorg-server-1.7.7-r1
x11-libs/gtk+-2.20.1-r1

Is it a gtk+ problem?

@lude: Did you solve it?

Flow
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lude
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PostPosted: Wed Sep 01, 2010 12:38 pm    Post subject: Reply with quote

Not yet, about to try it today with the shiny new nVidia drivers that were just merged into portage.

I'll post results.
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Flow__
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PostPosted: Wed Sep 01, 2010 6:22 pm    Post subject: Reply with quote

Nvidia Linux Support told me that it´s a known Bug, which affects Xinerama configurations where GPUs from different GPU families are in use. The next driver series after the 256.xx series will contain a fix. Until then, I have to use different Screens (Xinerama disabled) or maybe an other driver.
This problem seems to be old as I found a similar report at the nvnews forums from June 2009: http://www.nvnews.net/vbulletin/showthread.php?t=134605

I hope that they will fix it soon.

Until then, it would be great if someone could post a success story with Xinerama and different GPU families. I can´t believe that this can´t be done right know somehow....

Flow.
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Flow__
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PostPosted: Mon Sep 13, 2010 1:54 pm    Post subject: Solved: Update to nvidia-drivers-260.19.04 Reply with quote

I can confirm that the issue is gone with nvidia-drivers 260.19.04. Thanks nvidia for solving the issue!

Flow
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