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

[Bela Lubkin]

Binary package hint: xfce4-mixer

Looks like duplicate of 328358, 328666. But this is on x86 rather than amd64 arch. Stack trace
is very similar, hopefully the different-arch dump will offer some extra angles on debugging this.

System is ultra-wimpy Compaq Presario 2266 (has "Designed for Microsoft Windows 98" sticker
on its face). 225MHz Cyrix MII processor, 256MiB RAM, SiS 5597(?) video chip. Linux doesn't
detect _any_ audio devices beyond the traditional PC speaker.

Install is Xubuntu Jaunty Alpha 4, installed from alternative ISO, subsequently updated daily with
the latest truckload of new packages. Today seems to be the first time mixer crashed, so maybe
some new bugs were downloaded today.

xcfe mixer applet does run, I get the little speaker icon, but trying to interact with it gets a
dialog box "GStreamer was unable to detect any sound devices. Some sound system specific
GStreamer packages may be missing. It may also be a permissions problem." -- which seems
pretty reasonable if there are no audio devices.

The crash happened during login and would have been completely silent / unnoticable if apport
hadn't stuck the report in my face.

This is my first apport-injected semi-auto Ubuntu bug report. I notice there are already two
other bugs on the same issue. If there's a more proper way that I should have pasted this
report onto one of those other two, please enlighten me, I want to do it right next time.

>Bela<

PS: I've been getting a repeated Xorg crash, but every single time it happens apport refuses to
inject a bug because I have out-of-date packages. By the time I successfully login, update to
current packages, log out, log back in and get the crash, it's already out of date again (!!)

Well maybe not quite that bad. Machine is so slow that I do not do gratuitous logout / login
cycles, typically login about once a day. As with the mixer crash, the Xorg crash would be
"silent" but for (1) taking forever to finish the dump, making login Extra Extra Slow, and (2)
apport poking me in the face with it. /var/log/X*.log comparison between a crash and the
subsequent successful startup is unenlightening, they're pretty much identical until the crash,
which is logged in X*.log as a traceback. The punchline is /usr/lib/xorg/modules/libshadow.so:
shadowRemove()+0x4e.

Yes I know this is irrelevant to the bug at hand, just exercising my frustration at not being able
to apport-report it due to always being out of date.

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/lib/xfce4/panel-plugins/xfce4-mixer-plugin
Package: xfce4-mixer 1:4.5.99.1-0ubuntu1
ProcCmdline: /usr/lib/xfce4/panel-plugins/xfce4-mixer-plugin socket_id 16777272 name xfce4-mixer-plugin id 5 display_name Mixer size 24 screen_position 1
ProcEnviron:
 LANG=en_US.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 2.6.28-7-generic i686
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse lpadmin netdev plugdev sambashare tape video

[[e-mail] (jeanphilippe-green)]

This happens to me too. I have an Acer Aspire 4810T.

[zeus (zeus-tunalkan)]

I have the package xfce4-mixer 1:4.6.0-1ubuntu2, and I'm 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?