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[GH-ISSUE #600] Causes mate-volume-control to segfault and audio issues #418

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opened 2026-05-05 05:49:30 -06:00 by gitea-mirror · 3 comments

gitea-mirror commented

2026-05-05 05:49:30 -06:00

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Originally created by @Korons on GitHub (Jun 26, 2016).
Original GitHub issue: https://github.com/netblue30/firejail/issues/600

Edit: I'm running Ubuntu mate 16.04

Whenever I run a program in firejail mate-volume-control segfaults (unless ran with firejail) and all non-firejailed programs (Aside from mpv) lose the ability to play sound.

For example I started firefox in firejail and now running mate-volume-control outputs

shm_open() failed: No such file or directory shm_open() failed: No such file or directory ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Protocol error (mate-volume-control:6721): libmatemixer-alsa-WARNING **: Failed to open ALSA control for default: Connection refused (mate-volume-control:6721): GLib-CRITICAL **: g_source_remove_poll: assertion '!SOURCE_DESTROYED (source)' failed Segmentation fault (core dumped)

Trying to start VLC without firejail outputs

shm_open() failed: No such file or directory [0000000000845d18] pulse audio output error: PulseAudio server connection failure: Protocol error [000000000076a148] core libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. shm_open() failed: No such file or directory ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Protocol error [0000000000845d18] alsa audio output error: cannot open ALSA device "default": Connection refused

And trying to play a video in VLC outputs the following error

Audio output failed: The audio device "default" could not be used: Connection refused.

However all programs play audio fine if ran with firejail.

Originally created by @Korons on GitHub (Jun 26, 2016). Original GitHub issue: https://github.com/netblue30/firejail/issues/600 Edit: I'm running Ubuntu mate 16.04 Whenever I run a program in firejail `mate-volume-control` segfaults (unless ran with firejail) and all non-firejailed programs (Aside from mpv) lose the ability to play sound. For example I started firefox in firejail and now running `mate-volume-control` outputs `shm_open() failed: No such file or directory shm_open() failed: No such file or directory ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Protocol error (mate-volume-control:6721): libmatemixer-alsa-WARNING **: Failed to open ALSA control for default: Connection refused (mate-volume-control:6721): GLib-CRITICAL **: g_source_remove_poll: assertion '!SOURCE_DESTROYED (source)' failed Segmentation fault (core dumped)` Trying to start VLC without firejail outputs `shm_open() failed: No such file or directory [0000000000845d18] pulse audio output error: PulseAudio server connection failure: Protocol error [000000000076a148] core libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface. shm_open() failed: No such file or directory ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Protocol error [0000000000845d18] alsa audio output error: cannot open ALSA device "default": Connection refused` And trying to play a video in VLC outputs the following error `Audio output failed: The audio device "default" could not be used: Connection refused.` However all programs play audio fine if ran with firejail.

gitea-mirror

2026-05-05 05:49:30 -06:00

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gitea-mirror commented

2026-05-05 05:49:36 -06:00

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@Fred-Barclay commented on GitHub (Jun 26, 2016):

G'day Korons. :) A couple of questions:

Did you ever run firecfg?
What distro and MATE version?
I noticed that Pulse Audio complains in both of your error messages. Have you tried this?

@Fred-Barclay commented on GitHub (Jun 26, 2016): G'day Korons. :) A couple of questions: 1. Did you ever run `firecfg`? 2. What distro and MATE version? 3. I noticed that Pulse Audio complains in both of your error messages. Have you tried [this](https://firejail.wordpress.com/support/known-problems/#pulseaudio)?

gitea-mirror commented

2026-05-05 05:49:37 -06:00

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@Korons commented on GitHub (Jun 26, 2016):

returns firecfg: command not found
Ubuntu 16.04. The mate verison is 1.12.1
That fixed it. Thanks!

@Korons commented on GitHub (Jun 26, 2016): 1) returns `firecfg: command not found` 2) Ubuntu 16.04. The mate verison is 1.12.1 3) That fixed it. Thanks!

gitea-mirror commented

2026-05-05 05:49:40 -06:00

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@Fred-Barclay commented on GitHub (Jun 26, 2016):

No worries mate. :) LMDE 2 with Mate v. 1.14 here myself.

firecfg was added in the last firejail release (0.9.40). If you're using the firejail from Ubuntu's repos then that's v. 0.9.38 (I think) and firecfg wasn't part of it.

@Fred-Barclay commented on GitHub (Jun 26, 2016): No worries mate. :) LMDE 2 with Mate v. 1.14 here myself. `firecfg` was added in the last firejail release (0.9.40). If you're using the firejail from Ubuntu's repos then that's v. 0.9.38 (I think) and firecfg wasn't part of it.

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Reference: github-starred/firejail#418

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