[Expired for xorg-server (Ubuntu) because there has been no activity for
60 days.]

** Changed in: xorg-server (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/533622

Title:
  "sudo strace -p $(pgrep X)" hangs system after a few seconds

Status in xorg-server package in Ubuntu:
  Expired

Bug description:
  I've tried "sudo strace -p $(pgrep X)" in a KDE konsole to see what
  Xorg was doing that may cause high cpu load.

  After a few seconds and lot of output, the system hung and I could not switch 
to another VT, but music kept playing in the background.
  Doing the REISUB sequence, the system restartet after Alt-SysRq-R or -E 
already.
  This was reproducible (I've tried it twice), the restart however appeared 
only once: it required a hard reset the other time.

  This is probably related to the generated output, since it did not
  happen on VT1 after reboot, where I've used "-o outputfile" though.

  Using "sudo strace -p $(pgrep X) -o /tmp/1" and "tail -f /tmp/1" also
  does not cause the hangup.

  ProblemType: Bug
  Architecture: i386
  Date: Sun Mar  7 04:06:46 2010
  DistroRelease: Ubuntu 10.04
  Lsusb:
   Bus 002 Device 004: ID 045e:00db Microsoft Corp. Natural Ergonomic Keyboard 
4000 V1.0
   Bus 002 Device 002: ID 1a7c:0068
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  NonfreeKernelModules: nvidia
  Package: xserver-xorg-core 2:1.7.5-1ubuntu2
  ProcCmdLine: root=UUID=73d091ef-8ee9-4ad2-9243-1ece878c1024 
resume=/dev/fastrcvg/swaplv ro acpi_use_timer_override usbcore.autosuspend=1 
splash
  ProcEnviron:
   LANGUAGE=
   PATH=(custom, user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.32-15.22-generic
  SourcePackage: xorg-server
  Uname: Linux 2.6.32-15-generic i686
  dmi.bios.date: 03/08/2007
  dmi.bios.vendor: Award Software International, Inc.
  dmi.bios.version: F9c
  dmi.board.name: NF-CK804
  dmi.board.vendor: Gigabyte Technology Co., Ltd.
  dmi.board.version: x.x
  dmi.chassis.type: 3
  dmi.modalias: 
dmi:bvnAwardSoftwareInternational,Inc.:bvrF9c:bd03/08/2007:svn:pn:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnNF-CK804:rvrx.x:cvn:ct3:cvr:
  system:
   distro:             Ubuntu
   codename:           lucidarchitecture:       i686kernel:             
2.6.32-15-generic

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