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[cancan101 <874200@xxxxxxxxxxxxxxxxxx>]

When I switched to gdm from lightdm, the issue still seemed to happen. I
see the segfault when switching users (and  I think to tty1 and then
back)

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https://bugs.launchpad.net/bugs/874200

Title:
  segfault when switching user

Status in “lightdm” package in Ubuntu:
  Confirmed

Bug description:
  When switching to another user lightdm hangs after entering password.
  Cursor just can't enter the field again. Dmesg shows the following:

  ...
  [   67.824062] hub 2-0:1.0: unable to enumerate USB device on port 2
  [17534.653543] show_signal_msg: 36 callbacks suppressed
  [17534.653553] lightdm[4737]: segfault at 0 ip   (null) sp b5dff14c error 4 in libglib-2.0.so.0.3000.0[110000+f7000]
  [17534.666035] init: lightdm main process (886) killed by SEGV signal
  [17685.206223] compiz[1674]: segfault at 0 ip b6bdb4f7 sp bfc713d0 error 6 in libnvidia-glcore.so.280.13[b5b2d000+18a0000]
  [17807.583211] init: tty1 main process ended, respawning
  [17809.882622] init: tty1 main process ended, respawning

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: lightdm 1.0.1-0ubuntu6
  ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
  Uname: Linux 2.6.38-11-generic i686
  NonfreeKernelModules: nvidia
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
  CheckboxSubmission: b346f016d264f3ef62407d5e29c198a2
  CheckboxSystem: daed2f3d6643b4a84b4520a2427f8c2b
  Date: Fri Oct 14 15:57:05 2011
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: lightdm
  UpgradeStatus: Upgraded to oneiric on 2011-10-02 (12 days ago)

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