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------------------------------------------------------------------------
On 2013-07-29T20:27:39+00:00 Moondrake wrote:

This is on a thinkpad T410 with Intel HD Graphics 5700MHD.

Since updating again to xorg-x11-drv-intel-2.21.12-1.fc18.x86_64 (.8 was
also showing this same bug, 2.20 was not) on Fedora 18 I can reliably
reproduce a segfault by min/maxing windows of some specific apps
(sometimes also occurs under other conditions). This is with SNA
enabled.

Xorg log backtrace seems bogus:

[220957.400] (EE)
[220957.400] (EE) Backtrace:
[220957.425] (EE) 0: /usr/bin/X (OsLookupColor+0x139) [0x472509]
[220957.427] (EE) 1: /lib64/libpthread.so.0 (__restore_rt+0x0) [0x3d9d00efff]
[220957.435] (EE) 2: /usr/lib64/xorg/modules/drivers/intel_drv.so 
(_init+0x2cad6) [0x7f6737f4ed96]
[220957.440] (EE) 3: /usr/lib64/xorg/modules/drivers/intel_drv.so 
(_init+0x4befe) [0x7f6737f8d30e]
[220957.441] (EE) 4: /usr/bin/X (BlockHandler+0x44) [0x43d9c4]
[220957.442] (EE) 5: /usr/bin/X (WaitForSomething+0x114) [0x469e84]
[220957.442] (EE) 6: /usr/bin/X (SendErrorToClient+0xe1) [0x4395d1]
[220957.443] (EE) 7: /usr/bin/X (_init+0x3a7a) [0x42b98a]
[220957.446] (EE) 8: /lib64/libc.so.6 (__libc_start_main+0xf5) [0x3d9c821a05]
[220957.447] (EE) 9: /usr/bin/X (_start+0x29) [0x428621]
[220957.447] (EE)
[220957.447] (EE) Segmentation fault at address 0x26
[220957.447]
Fatal server error:
[220957.448] Caught signal 11 (Segmentation fault). Server aborting
[220957.448]
[220957.448] (EE)

gdb backtrace shows:
Program received signal SIGSEGV, Segmentation fault.
has_offload_slaves (sna=0x7f6736c30000) at sna_accel.c:14700
14700           ScreenPtr screen = sna->scrn->pScreen;
(gdb) bt
#0  has_offload_slaves (sna=0x7f6736c30000) at sna_accel.c:14700
#1  0x00007f6737f416ee in stop_flush (scanout=0x10d7ab0, sna=0x7f6736c30000)
    at sna_accel.c:14763
#2  sna_accel_flush (sna=0x7f6736c30000) at sna_accel.c:14985
#3  sna_accel_block_handler (sna=0x7f6736c30000, tv=0x7fffda2846d8)
    at sna_accel.c:15425
#4  0x000000000043d9c4 in BlockHandler (
    pTimeout=pTimeout@entry=0x7fffda2846d8,
    pReadmask=pReadmask@entry=0x81c340 <LastSelectMask>) at dixutils.c:387
#5  0x0000000000469e84 in WaitForSomething (
    pClientsReady=pClientsReady@entry=0x133fa20) at WaitFor.c:210
#6  0x0000000000439581 in Dispatch () at dispatch.c:357
#7  0x00000000004282da in main (argc=9, argv=0x7fffda284ae8,
    envp=<optimized out>) at main.c:298

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/1203273/comments/8

------------------------------------------------------------------------
On 2013-07-29T20:37:35+00:00 Chris Wilson wrote:

Can you recompilewith --enable-debug=full, then grab a gdb "bt full" and
attach the Xorg.0.log?

Reply at: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-
intel/+bug/1203273/comments/9


** Changed in: xserver-xorg-video-intel
       Status: Unknown => Confirmed

** Changed in: xserver-xorg-video-intel
   Importance: Unknown => Medium

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1203273

Title:
  Xorg crashed with SIGABRT in has_offload_slaves()

Status in X.org xf86-video-intel:
  Confirmed
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Incomplete

Bug description:
  For no reason I was logged out. I saw some terminal text about apache2
  and tomcat (what ever that is) then brought to login screen again. I
  type in my password the desktop appears again and the error report
  dialog >> and now I'm here reporting to help the cause.

  ProblemType: Crash
  DistroRelease: Ubuntu 13.10
  Package: xserver-xorg-core 2:1.14.2-0ubuntu1
  ProcVersionSignature: Ubuntu 3.10.0-4.13-generic 3.10.1
  Uname: Linux 3.10.0-4-generic x86_64
  ApportVersion: 2.11-0ubuntu1
  Architecture: amd64
  CrashCounter: 1
  Date: Sat Jul 20 06:47:18 2013
  ExecutablePath: /usr/bin/Xorg
  InstallationDate: Installed on 2013-07-19 (0 days ago)
  InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130717)
  MarkForUpload: True
  ProcCmdline: /usr/bin/X -core :0 -auth /var/run/lightdm/root/:0 -nolisten tcp 
vt7 -novtswitch -background none
  ProcEnviron:
   
  Signal: 6
  SourcePackage: xorg-server
  StacktraceTop:
   ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
   ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so
   BlockHandler ()
   WaitForSomething ()
   ?? ()
  Title: Xorg crashed with SIGABRT in BlockHandler()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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