unity-panel-service crashed with SIGSEGV in panel_service_show_entry()

[VinDSL]

Binary package hint: unity

2.6.39-020639rc1-generic_2.6.39-020639rc1 does not seem to like the panel service, in Unity or Classic UI.

I know this is an unpatched kernel, but I thought I should report it anyway. :)

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: unity 3.8.2-0ubuntu1
Uname: Linux 2.6.39-020639rc1-generic i686
NonfreeKernelModules: nvidia
Architecture: i386
CrashCounter: 1
Date: Sun Apr 3 00:36:57 2011
DistroCodename: natty
DistroVariant: ubuntu
ExecutablePath: /usr/lib/unity/unity-panel-service
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
InstallationMedia_: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
InstallationMedia__: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110302)
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x804fffc <panel_service_show_entry+204>: mov (%edx),%eax
 PC (0x0804fffc) ok
 source "(%edx)" (0x726f6873) not located in a known VMA region (needed readable region)!
 destination "%eax" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 panel_service_show_entry ()
 ?? ()
 ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
 ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
 g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in panel_service_show_entry()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu1

[Apport retracing service (apport)]

StacktraceTop:
 panel_service_show_entry ()
 ?? ()
 call_in_idle_cb (user_data=0xb446f6f0) at /build/buildd/glib2.0-2.28.4/./gio/gdbusconnection.c:4427
 g_idle_dispatch (source=0x926d3c8, callback=0xb71f45d0 <call_in_idle_cb>, user_data=0xb446f6f0) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:4545
 g_main_dispatch (context=0x908aa40) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:2440

[Omer Akram (om26er)]

is this issue reproduce able everytime? if so are there any steps to re-create the issue so that I could then install 2.6.39-** kernel.

[VinDSL (perfect-pecker)]

I haven't been able to reproduce it, in the past three hours. Here's what happened...

I installed the 2.6.39 r1 kernel and everything built correctly. Then I did a restart.

First, I booted into Ubuntu Classic. It was working fine until the Gnome panel service crashed, followed immediately by a Tomboy crash.

I restarted again -- this time in Unity. Then the Unity panel service crashed (with an error dialog similar to Ubuntu Classic ), so I submitted this bug report.

Afterward, I powered-down this machine, and did a cold boot. Once again, I went into Ubuntu Classic.

The panels had returned, but all of the Indicator Applets in the upper panel were missing. I reinstalled the Applets, and it hasn't crashed since.

I've also spent an hour or two in Unity, with no recurrences.

So, these might have been flukes, that were corrected by doing a power-down and cold boot.

If it happens again, I'll report back.

Thanks, for the quick reply!

[Omer Akram (om26er)]

I believe this crash have nothing to do with the latest kernel. It just happened.

[Neil J. Patel (njpatel)]

Hi, is this reproducible with latest Unity? I couldn't seem to make it happen anymore with unreponsive windows. Marking as incomplete pending feedback.

[Eliah Kagan (degeneracypressure)]

Bug 707530 and this look like the same crash as this.

Also, duplicate bug 806141 looks like it has a complete symbolic retrace.

[David Barth (dbarth)]

Thanks for the references Eliah.
One of the bugs is fixed and the other marked as incomplete, with no activity on the bug since the last release.

The issue is most probably fixed, but this bug report can't help anymore -> invalid.