xfce4-mixer-plugin crashed with SIGSEGV in free()

Bug #326441 reported by spidernr
288
This bug affects 9 people
Affects Status Importance Assigned to Milestone
xfce4-mixer (Ubuntu)
Fix Released
Medium
Unassigned
Declined for Jaunty by Cody A.W. Somerville

Bug Description

Binary package hint: xfce4-mixer

don't know

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/lib/xfce4/panel-plugins/xfce4-mixer-plugin
NonfreeKernelModules: nvidia
Package: xfce4-mixer 1:4.5.99.1-0ubuntu1
ProcCmdline: /usr/lib/xfce4/panel-plugins/xfce4-mixer-plugin socket_id 8460110 name xfce4-mixer id 12339728690 display_name Controllo\ volume size 24 screen_position 1
ProcEnviron:
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: xfce4-mixer
StacktraceTop:
 free () from /lib/tls/i686/cmov/libc.so.6
 g_free () from /usr/lib/libglib-2.0.so.0
 ?? ()
 g_cclosure_marshal_VOID__VOID ()
 g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
Title: xfce4-mixer-plugin crashed with SIGSEGV in free()
Uname: Linux 2.6.28-6-generic i686
UserGroups: adm admin cdrom dialout lpadmin mythtv plugdev sambashare

Related branches

Revision history for this message
spidernr (nicolaragno) wrote :
Revision history for this message
Apport retracing service (apport) wrote : Symbolic stack trace

StacktraceTop:free () from /lib/tls/i686/cmov/libc.so.6
IA__g_free (mem=0xe00)
xfce_mixer_plugin_free (plugin=0x82662c8,
IA__g_cclosure_marshal_VOID__VOID (closure=0x8304fe8,
IA__g_closure_invoke (closure=0x8304fe8, return_value=0x0,

Revision history for this message
Apport retracing service (apport) wrote : Symbolic threaded stack trace
Changed in xfce4-mixer:
importance: Undecided → Medium
Revision history for this message
Charlie Kravetz (cjkgeek) wrote :

Thanks for reporting this bug and any supporting documentation. Since this bug has enough information provided for a developer to begin work, I'm going to mark it as confirmed and let them handle it from here. Thanks for taking the time to make Ubuntu better!

Changed in xfce4-mixer:
status: New → Triaged
Revision history for this message
Bela Lubkin (filbo) wrote :

I thought the apport automatic uploads included more information, like lshw & lsmod outputs.

A possibly significant detail occurred to me about my duplicate of this issue (bug 329013); I
wanted to check if the same was true of the others.

My system that has the problem has no audio hardware. PC Speaker is all. [it has an SB16-ish clone that isn't being recognized.] When Mixer is working it has only "Master" volume; when I open the full Mixer UI it shows only two audio "devices", a Null Source and a Null Sink.

So maybe it's crashing due to assuming at least one non-null audio device is present.

To duplicate on system with working sound hardware (general idea -- not tested by me):

  sudo 'echo "blacklist snd" > /etc/modprobe.d/local-blacklist'

then reboot. You might need a different point of leverage in the sound stack, I haven't explored. _Might_ be sufficient to unload sound drivers when already running -- but only if that causes Mixer [via HAL?]
to forget about the hardware; and then only if it leaves Mixer in the bad state. Try:

  lsmod | awk '/snd/ { print $1}' | sudo xargs rmmod

[not recommended unless you're comfortable with module hackery & prepared for a possible system crash...]

Revision history for this message
Mathias Menzer (mfm) wrote :

Same Problem, xfce4-mixer 1.4.6.0-1ubuntu1 on Xubuntu 9.04-alpha5

Revision history for this message
Florent (florent.x) wrote :

Same here with Jaunty

  xfce4-mixer 1:4.6.0-1ubuntu1
  linux-image-2.6.28-10-generic 2.6.28-10.33

root@jaunty# dmesg | grep xfce
xfce4-mixer-plu[4073]: segfault at dfc ip b749e572 sp bf88ad50 error 4 in libc-2.9.so[b742d000+15c000]

Revision history for this message
Phil (phil-mob453) wrote :

echoing Bela Lubkin, my system this happens on has no audio hardware but the pc speaker

Revision history for this message
Jacob Litewski (j.litewski) wrote :

I get crash reports when I start up. My mixer works fine, it doesn't have any null entries or anything. It just started happening when I installed 9.04 Beta. I'll post my crash report the next time I restart.

Revision history for this message
Steffen (stmllr) wrote :

same problem on my machine, using xubuntu-9.04-beta-desktop-i386 in a VirtualBox 2.1.4 32bit with vbox guest additions.

Revision history for this message
Tamaris (glyann+launchpad) wrote :

Same thing on Xubuntu 9.04 alpha and beta processor x86_64.
Crash without reason but still everything going normally.

Revision history for this message
Jacob Litewski (j.litewski) wrote :

I got the crash again. Attached is the txt file i pulled from /var/crash/.

hopefully this helps a bit.

Revision history for this message
Antioch (sesshomaru-2k3) wrote :

Same error here too - fresh 9.04 Xubuntu 32-bit install on an Intel e5200 with an nVidia 9300 chipset (and the BIOS set to pass audio over HDMI).

Revision history for this message
Andrei Ciobanu (gnomemory) wrote :

Bug encounter :).
9.04 Xubuntu 32.

Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package xfce4-mixer - 1:4.6.0-1ubuntu2

---------------
xfce4-mixer (1:4.6.0-1ubuntu2) jaunty; urgency=low

  * debian/patches/xfce4-mixer_fix_crash_on_exit.patch:
    - Patched the xfce4 mixer panel applet to not crash on exit.
    - Patched forwarded upstream to maintainer Jannis Pohlmann.
    - Fixes lp: #326441 and its dozen of dups. :)
  * debian/control: Added build dependency on quilt.
  * debian/rules: Updated to use quilt patch system.
  * debian/patches/series: Refreshed.

 -- <email address hidden> (Cody A.W. Somerville) Thu, 02 Apr 2009 12:19:37 -0300

Changed in xfce4-mixer (Ubuntu):
status: Triaged → Fix Released
Revision history for this message
zeus (zeus-tunalkan) wrote :

Hmmm... I have the package xfce4-mixer 1:4.6.0-1ubuntu2, but I' suffering this "bug" since two days ago. Sound was working flawless until I uninstalled the alsa-drivers-linuxant package (which I had installed for trying to make the modem work). After this uninstallation, now I get the dreaded message: "GStreamer was unable to detect any sound devices. Some sound system specific GStreamer packages may be missing. It may also be a permissions problem". However, all the gstreamer packages needed are installed. My /dev/sndstat says, among other things, "Card config: --no soundcards--". Is this bug I'm experiencing, or maybe it's a different problem?

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