Red Hat Bugzilla – Bug 432711
cpu hang and ui freeze mp3/ogg playback through pulseaudio
Last modified: 2008-10-24 16:45:51 EDT
Description of problem: During playback of an mp3 format file rhythmbox occasionally crashes, accompanied by a 100% cpu use hang and ui freeze. There is no output I've seen yet, but backtraces are attached. There are two situations in which I'm seeing this type of freeze, both with the 100% cpu hang and unresponsive ui. 1- playback gets blocked by changing VTs making rhythmbox not in the active session, rhythmbox continues trying to play the track, track time continues - when rhythmbox gets focus again in the active session it sometimes continues to play normally - sometimes it freezes up with the cpu hang and the track time stops, the ui is unresponsive, and rhythmbox must be killed 2- rhythmbox is playing the track normally in the active session, then suddenly it stops playing, ui becomes unresponsive, track time stops In both cases it is not just a lack of sound output. The blocked sound output while in the inactive session is expected right now, but rhythmbox needs to remain responsive when the X session is active again. Version-Release number of selected component (if applicable): rhythmbox-0.11.4-7.fc9.i386 pulseaudio-0.9.8-5.fc9.i386 gstreamer-0.10.17-1.fc9.i386 gstreamer-plugins-good-0.10.6-7.fc9.i386 gstreamer-plugins-farsight-0.12.5-1.fc8.i386 gstreamer-plugins-base-0.10.17-1.fc9.i386 gstreamer-plugins-bad-extras-0.10.5-15.lvn9.i386 gstreamer-plugins-pulse-0.9.5-0.4.svn20070924.fc8.i386 gstreamer-ffmpeg-0.10.3-1.lvn9.i386 gstreamer-tools-0.10.17-1.fc9.i386 gstreamer-python-0.10.9-1.fc9.i386 gstreamer-debuginfo-0.10.17-1.fc9.i386 gstreamer-plugins-bad-0.10.5-15.lvn9.i386 gstreamer-plugins-ugly-0.10.6-5.lvn9.i386 gstreamer-plugins-schroedinger-0.9.0-2.fc9.i386 How reproducible: Sporadic crashes, cannot trigger it very reliably Steps to Reproduce: 1. play track in rhythmbox in active X session 2. change to a virtual terminal 3. return to X session Backtrace #1 is from situation 2 above, no virtual terminal switching, rhythmbox stops while the X session is active.
Created attachment 294851 [details] rhythmbox-crash-mp3-novtchange.txt
Created attachment 294852 [details] rhythmbox_crash_change_vt1.txt This is changing from X session to VT1 then back to X, no playback while on VT1, crash noticed when returned to X, cpu spinning, no track time changing
Created attachment 294853 [details] rhythmbox-crash-playing.txt This is a crash again for situation 1 where rhythmbox was playing in active X session, no vt change, suddenly it just stopped playing. The first backtrace posted is the most recent. The debug symbols were not all installed for the vt change backtrace. I'll try to trigger that again but it hasn't happened in a few days, and Lennart Poettering gave me a couple things to look for regarding pa device access in that VT change case.
Created attachment 294854 [details] rhythmbox_crash_after_galeon_sigsegv.txt Sorry, comment 3 is for situation 2, and so is this one. This was again rhythmbox crashing without change in VT, or anything else I know of effecting the device access. This occurred right after Galeon crashed, while debugging bug# 431162, so this is questionable (cpu was already spinning from galeon, could have effected this crash).
Created attachment 294859 [details] rhythmbox-after-firefox-kill-in-gdb.txt Here is another crash after killing another process. Debugging firefox in gdb, after firefox is hanging, I backtrace firefox while rhythmbox is playing (everything ok so far). Then, I kill firefox from within gdb, and immediately rhythmbox hangs. This backtrace is from as soon as I could attach to it after that. Basically, the same situation as the galeon crash above.
Created attachment 294861 [details] rhythmbox-crash-vtswitch-and-pactl-list.txt Rhythmbox crash after VT switching (it worked fine 3 or 4 times, seemingly just streaming the song while I was viewing VT1, then playing when I returned (the position in the song did move, so not paused during that time). Then after doing the switch again and returning rhythmbox was frozen. The attached has the backtrace (attached after the freeze) and 'pactl list' showing devices not suspended, and 'getfacl /dev/snd/*'.
Created attachment 294944 [details] rhythmbox-crash-oggvorbis-novtchange.txt Occurs with ogg vorbis files as well, so this does not look like an mp3 decoder related issue.
Another interesting thing to note, these crashes are happening frequently RIGHT AFTER some other events in the system, and so fast that they seem related. For instance, the kill of a program being debugged in gdb, or crashing immediately after yum finishes a set of updates/installs. I just installed imlib, feh, gimmage, and qiv (image viewers) and as soon as the 'Complete!' message from yum showed up rhythmbox hung itself. I had just tried to update all my packages and it failed with a yum bug, but did not crash rhythmbox, so its very circumstantial.
More details. Banshee has its own set of problems (not rebuilt in rawhide since fc8 build) but it is playing mp3 files through gstreamer and pulseaudio just fine. I cannot cause banshee to hang like this either by switching consoles or just playing for hours. With the very same configuration I can change to rhythmbox playing and hang it very quickly.
Reassigning to gstreamer-plugins-pulse, as it should fail nicely if PulseAudio loses its access rights on the sound device.
Changing version to '9' as part of upcoming Fedora 9 GA. More information and reason for this action is here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping
The pulse plugin from current gstreamer-plugins-good fixes this issue.