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[WinstonChurchill <674762@xxxxxxxxxxxxxxxxxx>]

Uninstallation of the NVIDIA drivers resolves this issue entirely -
thus, it is probably not Xorg's fault.

With the NVIDIA drivers installed, this issue only occurs when the "Xinerama" option is enabled. 
This is may be related to several other bugs filed against the NVIDIA drivers, but I believe it is a unique issue.

** Package changed: xorg (Ubuntu) => nvidia-graphics-drivers (Ubuntu)

** Description changed:

  Binary package hint: xorg
  
  When VLC is run after the upgrade to 10.10, X crashes and is restarted -
- logs reveal this is due to a SIGSEGV. Skype also causes this behaviour;
- Totem does not, however. I have attached relevant hardware references -
- I can of course provide more information if needed.
+ logs reveal this is due to a SIGSEGV. Skype, Vidalia (TOR), and
+ virtualbox also cause this behaviour, among others; Totem does not,
+ however. I have attached relevant hardware references - I can of course
+ provide more information if needed.
+ 
+ Graphics card is a GeForce9800.
  
  Xorg Version: xorg-server 2:1.7.6-2ubuntu7
  
  Xorg.log:
  [ 27248.309] Backtrace:
  [ 27248.309] 0: /usr/bin/X (xorg_backtrace+0x28) [0x4a0fa8]
  [ 27248.309] 1: /usr/bin/X (0x400000+0x60fcd) [0x460fcd]
  [ 27248.309] 2: /lib/libpthread.so.0 (0x7fc8b17eb000+0xfb40) [0x7fc8b17fab40]
  [ 27248.309] 3: /usr/bin/X (0x400000+0xbb22f) [0x4bb22f]
  [ 27248.309] 4: /usr/bin/X (0x400000+0x2c2d9) [0x42c2d9]
  [ 27248.309] 5: /usr/bin/X (0x400000+0x2184b) [0x42184b]
  [ 27248.309] 6: /lib/libc.so.6 (__libc_start_main+0xfe) [0x7fc8b0756d8e]
  [ 27248.309] 7: /usr/bin/X (0x400000+0x213d9) [0x4213d9]
  [ 27248.309] Segmentation fault at address 0x4
  [ 27248.309] Caught signal 11 (Segmentation fault). Server aborting
  
  kern.log:
  Nov 12 19:02:14 Desktop kernel: [27262.043620] 3:4:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:14 Desktop kernel: [27262.063602] 3:3:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:14 Desktop kernel: [27262.064089] 3:3:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:14 Desktop kernel: [27262.099722] 3:4:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:15 Desktop kernel: [27262.121478] 3:3:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:15 Desktop kernel: [27262.121960] 3:3:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:15 Desktop kernel: [27262.144841] 3:3:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:15 Desktop kernel: [27262.145330] 3:3:1: endpoint lacks sample rate attribute bit, cannot set.
  Nov 12 19:02:15 Desktop kernel: [27262.148362] 3:3:1: endpoint lacks sample rate attribute bit, cannot set.

-- 
SEGFAULT in xorg-server when VLC is run
https://bugs.launchpad.net/bugs/674762
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