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[Bug 1519277] [NEW] Xorg segfault on external display plug/unplug

 

Public bug reported:

Lenovo Thinkpad E540, Ubuntu 15.10, xorg 1:7.7+7ubuntu4, driver NVIDIA
352.63 (also reproduces with NVIDIA 340.96 and nouveau)

When I plug/unplug external display (VGA or HDMI), X server crashes with
the following backtrace:

[   115.212] (II) XKB: reuse xkmfile /var/lib/xkb/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm
[   116.571] (EE) 
[   116.571] (EE) Backtrace:
[   116.571] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x564e760ab68e]
[   116.571] (EE) 1: /usr/bin/X (0x564e75ef7000+0x1b89f9) [0x564e760af9f9]
[   116.571] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f1d7f12b000+0x352f0) [0x7f1d7f1602f0]
[   116.571] (EE) 3: /usr/bin/X (DamageRegister+0x11) [0x564e760323e1]
[   116.571] (EE) 4: /usr/bin/X (0x564e75ef7000+0xd9b08) [0x564e75fd0b08]
[   116.571] (EE) 5: /usr/bin/X (BlockHandler+0x8a) [0x564e75f53cca]
[   116.572] (EE) 6: /usr/bin/X (WaitForSomething+0x163) [0x564e760a83f3]
[   116.572] (EE) 7: /usr/bin/X (0x564e75ef7000+0x57fa1) [0x564e75f4efa1]
[   116.572] (EE) 8: /usr/bin/X (0x564e75ef7000+0x5c34b) [0x564e75f5334b]
[   116.572] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f1d7f14ba40]
[   116.572] (EE) 10: /usr/bin/X (_start+0x29) [0x564e75f3d6c9]
[   116.572] (EE) 
[   116.572] (EE) Segmentation fault at address 0x10
[   116.572] (EE) 
Fatal server error:
[   116.572] (EE) Caught signal 11 (Segmentation fault). Server aborting

Expected - not to crash.

The problem occurred after update from 15.04 to 15.10

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: 15.10 crash nvidia segfault xorg

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https://bugs.launchpad.net/bugs/1519277

Title:
  Xorg segfault on external display plug/unplug

Status in xorg package in Ubuntu:
  New

Bug description:
  Lenovo Thinkpad E540, Ubuntu 15.10, xorg 1:7.7+7ubuntu4, driver NVIDIA
  352.63 (also reproduces with NVIDIA 340.96 and nouveau)

  When I plug/unplug external display (VGA or HDMI), X server crashes
  with the following backtrace:

  [   115.212] (II) XKB: reuse xkmfile /var/lib/xkb/server-B20D7FC79C7F597315E3E501AEF10E0D866E8E92.xkm
  [   116.571] (EE) 
  [   116.571] (EE) Backtrace:
  [   116.571] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x564e760ab68e]
  [   116.571] (EE) 1: /usr/bin/X (0x564e75ef7000+0x1b89f9) [0x564e760af9f9]
  [   116.571] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f1d7f12b000+0x352f0) [0x7f1d7f1602f0]
  [   116.571] (EE) 3: /usr/bin/X (DamageRegister+0x11) [0x564e760323e1]
  [   116.571] (EE) 4: /usr/bin/X (0x564e75ef7000+0xd9b08) [0x564e75fd0b08]
  [   116.571] (EE) 5: /usr/bin/X (BlockHandler+0x8a) [0x564e75f53cca]
  [   116.572] (EE) 6: /usr/bin/X (WaitForSomething+0x163) [0x564e760a83f3]
  [   116.572] (EE) 7: /usr/bin/X (0x564e75ef7000+0x57fa1) [0x564e75f4efa1]
  [   116.572] (EE) 8: /usr/bin/X (0x564e75ef7000+0x5c34b) [0x564e75f5334b]
  [   116.572] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f1d7f14ba40]
  [   116.572] (EE) 10: /usr/bin/X (_start+0x29) [0x564e75f3d6c9]
  [   116.572] (EE) 
  [   116.572] (EE) Segmentation fault at address 0x10
  [   116.572] (EE) 
  Fatal server error:
  [   116.572] (EE) Caught signal 11 (Segmentation fault). Server aborting

  Expected - not to crash.

  The problem occurred after update from 15.04 to 15.10

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