ubuntu-x-swat team mailing list archive

[Bryce Harrington <611380@xxxxxxxxxxxxxxxxxx>]

Please collect a full backtrace on this crash - see
http://wiki.ubuntu.com/X/Backtracing for guidance.

** Description changed:

  (As this bug probably has something to do with the interaction between
  the KDE app(s) in question and GNOME and X, I'm not totally sure where
  to put this.)
  
  -------------------------------------------
  updated tl;dr: If I'm using a KDE app during a GNOME session, sometimes it will log me out, which upon further research is caused by an X Server crash.  This happens when a KDE program segfaults. The problem is that I know quite well that the segmentation faults in KDE apps are usually caught by the crash handler. And since I don't have a KDE desktop, I don't think the crash handler actually catches these segfaults when one is not using the full KDE desktop. Obviously, it probably should.
  -------------------------------------------
  
  I'm using the usual Ubuntu (GNOME) install, updated regularly but
  running one or two KDE-based apps on top of it - the one that most
  commonly triggers this condition is KolourPaint on top of GNOME, but
  that's because that's the one I most commonly use.  (Then again, I'm
  using it because GNOME-based paint program clones are not nearly at that
  level of development.)
  
  This is what I generally do:
  1. Log in and start any GNOME programs.  This works fine.
  2. Start the KDE-based program.  This also works fine.
  3. At some point while fooling around with said KDE-based program, the entire X Server is brought down.  No, I can't seem to isolate this to any particular action or set of actions.
  
  Notes:
  1. This error seems to have replaced the fact that when said program crashes, it brings up an error screen with the intent to report a bug, where the button to actually report said bug is nonfunctional (due to the fact that I do not actually have a full complement of Kubuntu packages).
  2. The error in question, both in the previous report-a-bug screen and now with X crashes, seems to be some sort of segmentation fault.  Not that I know what that means.
  3. I didn't report this error when it brought up the KDE error screen.  I report it now.  That's because I'd vastly prefer catching bugs, even without saving program state, to completely upending X.  Ending every program without so much as giving the user a chance to save state is /not nice/.
  4. Despite the fact that I'm not totally sure whether this is an X bug or not, I used the report-with-X-info anyway; it might be useful.
  5. I'm going to get a backtrace as soon as I can.
  
+ Backtrace:
+ 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80e937b]
+ 1: /usr/bin/X (0x8048000+0x61c7d) [0x80a9c7d]
+ 2: (vdso) (__kernel_rt_sigreturn+0x0) [0x986410]
+ 3: /usr/lib/xorg/modules/libfb.so (fbSegment+0x215) [0xe68045]
+ 4: /usr/lib/xorg/modules/libfb.so (fbZeroLine+0x13c) [0xe64bec]
+ 5: /usr/lib/xorg/modules/libfb.so (fbPolyLine+0x72) [0xe648d2]
+ 6: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb69000+0x63695) [0xbcc695]
+ 7: /usr/lib/xorg/modules/drivers/intel_drv.so (0xb69000+0x5c26b) [0xbc526b]
+ 8: /usr/bin/X (0x8048000+0xda0d8) [0x81220d8]
+ 9: /usr/bin/X (0x8048000+0x2860b) [0x807060b]
+ 10: /usr/bin/X (0x8048000+0x2a477) [0x8072477]
+ 11: /usr/bin/X (0x8048000+0x1ed7a) [0x8066d7a]
+ 12: /lib/tls/i686/cmov/libc.so.6 (__libc_start_main+0xe6) [0x275bd6]
+ 13: /usr/bin/X (0x8048000+0x1e961) [0x8066961]
+ Segmentation fault at address 0xb5f64ffc
+ 
+ Caught signal 11 (Segmentation fault). Server aborting
+ 
  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: xorg 1:7.5+5ubuntu1
  ProcVersionSignature: Ubuntu 2.6.32-24.38-generic 2.6.32.15+drm33.5
  Uname: Linux 2.6.32-24-generic i686
  Architecture: i386
  Date: Thu Jul 29 09:07:06 2010
  DkmsStatus: Error: [Errno 2] No such file or directory
  EcryptfsInUse: Yes
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  MachineType: Sony Corporation VGN-C190G
  PccardctlIdent:
-  Socket 0:
-    no product info available
+  Socket 0:
+    no product info available
  PccardctlStatus:
-  Socket 0:
-    no card
+  Socket 0:
+    no card
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-24-generic root=UUID=0cb9888d-ddc8-4080-bd8b-4f36fdee854a ro quiet splash
  ProcEnviron:
-  LANG=en_US.utf8
-  SHELL=/bin/bash
+  LANG=en_US.utf8
+  SHELL=/bin/bash
  SourcePackage: xorg
  dmi.bios.date: 09/16/2006
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: R0030J4
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrR0030J4:bd09/16/2006:svnSonyCorporation:pnVGN-C190G:pvrR5216375:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: VGN-C190G
  dmi.product.version: R5216375
  dmi.sys.vendor: Sony Corporation
  system:
-  distro:             Ubuntu
-  codename:           lucid
-  architecture:       i686
-  kernel:             2.6.32-24-generic
+  distro:             Ubuntu
+  codename:           lucid
+  architecture:       i686
+  kernel:             2.6.32-24-generic
  
  [lspci]
  00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
-     	Subsystem: Sony Corporation Device [104d:820f]
+      Subsystem: Sony Corporation Device [104d:820f]

** Changed in: xserver-xorg-video-intel (Ubuntu)
   Importance: Undecided => High

** Changed in: xserver-xorg-video-intel (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/611380

Title:
  segfault in KDE app not caught; causes X crash

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