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[rubo77 <1509846@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

On Ubuntu 15.10 I get crashes, when I open a new window in an already
started application. It happens irregularely, but I can force the crash
if I open several new message windows in thunderbird. But it also
happens in other applilcations, for example a new terminal window.

This is the output during the crash in /var/log/Xorg.0.log
[   253.500] (EE)
[   253.500] (EE) Backtrace:
[   253.500] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x55f09075b62e]
[   253.500] (EE) 1: /usr/bin/X (0x55f0905a7000+0x1b8999) [0x55f09075f999]
[   253.500] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f44130a8000+0x352f0) [0x7f44130dd2f0]
[   253.500] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x24f18) [0x7f440f4a3f18]
[   253.500] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x26157) [0x7f440f4a5157]
[   253.500] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x2b4b1) [0x7f440f4aa4b1]
[   253.500] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x804e4) [0x7f440f4ff4e4]
[   253.501] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x80e2c) [0x7f440f4ffe2c]
[   253.501] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x82e1a) [0x7f440f501e1a]
[   253.501] (EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x4197c) [0x7f440f4c097c]
[   253.501] (EE) 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x59906) [0x7f440f4d8906]
[   253.501] (EE) 11: /usr/bin/X (_CallCallbacks+0x34) [0x55f090604654]
[   253.501] (EE) 12: /usr/bin/X (WriteToClient+0x244) [0x55f09075f274]
[   253.501] (EE) 13: /usr/bin/X (WriteEventsToClient+0x1e2) [0x55f09060a502]
[   253.501] (EE) 14: /usr/bin/X (0x55f0905a7000+0xf495a) [0x55f09069b95a]
[   253.501] (EE) 15: /usr/bin/X (0x55f0905a7000+0xf5ef5) [0x55f09069cef5]
[   253.501] (EE) 16: /usr/bin/X (0x55f0905a7000+0x5818f) [0x55f0905ff18f]
[   253.501] (EE) 17: /usr/bin/X (0x55f0905a7000+0x5c34b) [0x55f09060334b]
[   253.501] (EE) 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f44130c8a40]
[   253.501] (EE) 19: /usr/bin/X (_start+0x29) [0x55f0905ed6c9]
[   253.501] (EE)
[   253.501] (EE) Segmentation fault at address 0x0
[   253.501] (EE)
Fatal server error:
[   253.501] (EE) Caught signal 11 (Segmentation fault). Server aborting
[   253.501] (EE)
[   253.501] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org 
 for help.
[   253.501] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[   253.502] (EE)
[   253.502] (II) AIGLX: Suspending AIGLX clients for VT switch
[   253.588] (EE) Server terminated with error (1). Closing log file.

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

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https://bugs.launchpad.net/bugs/1509846

Title:
  lightdm crashes on window open in Ubuntu 15.10 Yoga 2 Pro

Status in xorg package in Ubuntu:
  New

Bug description:
  On Ubuntu 15.10 I get crashes, when I open a new window in an already
  started application. It happens irregularely, but I can force the
  crash if I open several new message windows in thunderbird. But it
  also happens in other applilcations, for example a new terminal
  window.

  This is the output during the crash in /var/log/Xorg.0.log
  [   253.500] (EE)
  [   253.500] (EE) Backtrace:
  [   253.500] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x55f09075b62e]
  [   253.500] (EE) 1: /usr/bin/X (0x55f0905a7000+0x1b8999) [0x55f09075f999]
  [   253.500] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f44130a8000+0x352f0) [0x7f44130dd2f0]
  [   253.500] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x24f18) [0x7f440f4a3f18]
  [   253.500] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x26157) [0x7f440f4a5157]
  [   253.500] (EE) 5: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x2b4b1) [0x7f440f4aa4b1]
  [   253.500] (EE) 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x804e4) [0x7f440f4ff4e4]
  [   253.501] (EE) 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x80e2c) [0x7f440f4ffe2c]
  [   253.501] (EE) 8: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x82e1a) [0x7f440f501e1a]
  [   253.501] (EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x4197c) [0x7f440f4c097c]
  [   253.501] (EE) 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f440f47f000+0x59906) [0x7f440f4d8906]
  [   253.501] (EE) 11: /usr/bin/X (_CallCallbacks+0x34) [0x55f090604654]
  [   253.501] (EE) 12: /usr/bin/X (WriteToClient+0x244) [0x55f09075f274]
  [   253.501] (EE) 13: /usr/bin/X (WriteEventsToClient+0x1e2) [0x55f09060a502]
  [   253.501] (EE) 14: /usr/bin/X (0x55f0905a7000+0xf495a) [0x55f09069b95a]
  [   253.501] (EE) 15: /usr/bin/X (0x55f0905a7000+0xf5ef5) [0x55f09069cef5]
  [   253.501] (EE) 16: /usr/bin/X (0x55f0905a7000+0x5818f) [0x55f0905ff18f]
  [   253.501] (EE) 17: /usr/bin/X (0x55f0905a7000+0x5c34b) [0x55f09060334b]
  [   253.501] (EE) 18: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f44130c8a40]
  [   253.501] (EE) 19: /usr/bin/X (_start+0x29) [0x55f0905ed6c9]
  [   253.501] (EE)
  [   253.501] (EE) Segmentation fault at address 0x0
  [   253.501] (EE)
  Fatal server error:
  [   253.501] (EE) Caught signal 11 (Segmentation fault). Server aborting
  [   253.501] (EE)
  [   253.501] (EE)
  Please consult the The X.Org Foundation support
           at http://wiki.x.org 
   for help.
  [   253.501] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
  [   253.502] (EE)
  [   253.502] (II) AIGLX: Suspending AIGLX clients for VT switch
  [   253.588] (EE) Server terminated with error (1). Closing log file.

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