lightdm crashed with SIGSEGV in check_stopped()

[Macron]

Bug last reported on 2011/9/14 with "Fix Released" stated but seems to have happened again in 12.04 alpha

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: lightdm 1.0.6-0ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-3.9-generic 3.2.0-rc4
Uname: Linux 3.2.0-3-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
CrashCounter: 1
Date: Sun Dec 11 11:25:45 2011
ExecutablePath: /usr/sbin/lightdm
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcCmdline: lightdm
ProcEnviron: PATH=(custom, no user)
SegvAnalysis:
 Segfault happened at: 0x411138: mov 0x28(%rax),%ecx
 PC (0x00411138) ok
 source "0x28(%rax)" (0xaaaaaaaaaaaaaad2) not located in a known VMA region (needed readable region)!
 destination "%ecx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: lightdm
StacktraceTop:
 ?? ()
 g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: lightdm crashed with SIGSEGV in g_closure_invoke()
UpgradeStatus: Upgraded to precise on 2011-12-04 (6 days ago)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 check_stopped (seat=0xf51a40) at seat.c:415
 g_closure_invoke (closure=0xf5f0f0, return_value=0x0, n_param_values=1, param_values=0xf62740, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gclosure.c:774
 signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0xf62740) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3302
 g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=0x7fff3bf83938) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3033
 g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3090

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sebastien Bacher (seb128)]

Robert, I'm reopening this bug since we got duplicates using lightdm 1.1.1 which was rolled after your fix and should have fixed the issue

[J Cord (j7cord)]

I am not getting this bug to happen now, I have switched to my computer
which uses Intel 3000 graphics, where the one I reported the crash on is an
earlier I7 without the 3000 series graphics and with a AMD ATi 6700 series
gdm. I was having no end of crashes after recent update on that machine.
 Actually so bad I thought I had a bad hard drive and replaced it, still
the same. The computer itself runs Fedora and Suse fine. Which leads me
to believe it is a problem between the gdm and precise. CPU nor gdm is
overclocked and using xorg drivers. Hope that may help.
Thank You

On Tue, Dec 20, 2011 at 11:13 PM, Launchpad Bug Tracker <
<email address hidden>> wrote:

> ** Branch linked: lp:lightdm
>
> --
> You received this bug notification because you are subscribed to a
> duplicate bug report (905405).
> https://bugs.launchpad.net/bugs/902698
>
> Title:
> lightdm crashed with SIGSEGV in check_stopped()
>
> Status in “lightdm” package in Ubuntu:
> Fix Committed
> Status in “lightdm” source package in Precise:
> Fix Committed
>
> Bug description:
> Bug last reported on 2011/9/14 with "Fix Released" stated but seems to
> have happened again in 12.04 alpha
>
> ProblemType: Crash
> DistroRelease: Ubuntu 12.04
> Package: lightdm 1.0.6-0ubuntu4
> ProcVersionSignature: Ubuntu 3.2.0-3.9-generic 3.2.0-rc4
> Uname: Linux 3.2.0-3-generic x86_64
> NonfreeKernelModules: nvidia
> ApportVersion: 1.90-0ubuntu1
> Architecture: amd64
> CrashCounter: 1
> Date: Sun Dec 11 11:25:45 2011
> ExecutablePath: /usr/sbin/lightdm
> InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64
> (20111012)
> ProcCmdline: lightdm
> ProcEnviron: PATH=(custom, no user)
> SegvAnalysis:
> Segfault happened at: 0x411138: mov 0x28(%rax),%ecx
> PC (0x00411138) ok
> source "0x28(%rax)" (0xaaaaaaaaaaaaaad2) not located in a known VMA
> region (needed readable region)!
> destination "%ecx" ok
> SegvReason: reading unknown VMA
> Signal: 11
> SourcePackage: lightdm
> StacktraceTop:
> ?? ()
> g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> g_signal_emit_valist () from
> /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
> Title: lightdm crashed with SIGSEGV in g_closure_invoke()
> UpgradeStatus: Upgraded to precise on 2011-12-04 (6 days ago)
> UserGroups:
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/902698/+subscriptions
>

[Rich Hart (sirwizkid)]

Both this and GDM are crashing on my system. It started after I tried the latest graphic driver #876499. I have X working again, but neither graphic login package will run.

[Robert Ancell (robert-ancell)]

Closing assumed fixed.