Comment 136 for bug 650539

> Exactly what problem are you seeing?
>
> If you've got problems in a single monitor setup then you'll be
> triggering a different bug. Please feel free to file a new bug so we
> can start to figure out the cause of your problem.

I'm seeing the same problem as Jérôme and Mauro. I have exactly one NVIDIA display adapter, using the proprietary driver (version 173 and "current" both exhibit the problem), and the adapter is attached to exactly one monitor. Emacs, rxvt, VLC, and xawtv crash the server. Here is the Xorg output:

  Backtrace:
  0: X (xorg_backtrace+0x3b) [0x80e82fb]
  1: X (0x8048000+0x5da8d) [0x80a5a8d]
  2: (vdso) (__kernel_rt_sigreturn+0x0) [0x13e40c]
  3: X (ProcessWorkQueue+0x30) [0x8073a60]
  4: X (WaitForSomething+0x56) [0x809fc06]
  5: X (0x8048000+0x25d3e) [0x806dd3e]
  6: X (0x8048000+0x1a5ba) [0x80625ba]
  7: /lib/libc.so.6 (__libc_start_main+0xe7) [0xd3ace7]
  8: X (0x8048000+0x1a191) [0x8062191]
  Segmentation fault at address (nil)

  Caught signal 11 (Segmentation fault). Server aborting

I ran through half of the demos in the "qtdemo" package and none crashed the server. (I don't have all the KDE infrastructure installed, so I didn't test that.) The server does *not* crash when using the free-software NVIDIA driver.

I have not been able to disable the Xinerama extension either by putting 'Option "Xinerama" "0"' in the "ServerLayout" sections, or by using the "-xinerama" command-line argument to /usr/bin/Xorg. I've read that the NVIDIA driver forces it on or something.

So our bug is probably not this one, would you agree? I couldn't find a report for our bug.