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[GH-ISSUE #3436] Sound only working with one program at a time with ALSA #2159

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opened 2026-05-05 08:50:07 -06:00 by gitea-mirror · 6 comments

gitea-mirror commented

2026-05-05 08:50:07 -06:00

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Originally created by @fareyozz on GitHub (May 27, 2020).
Original GitHub issue: https://github.com/netblue30/firejail/issues/3436

Describe the bug.
When starting software with firejail, only one can output audio. Any other program will be completely silent, and fail to start audio playback.
What did you expect to happen?
All software should be able to output audio at the same time.
What changed calling firejail --noprofile PROGRAM in a shell?
The program successfully outputs audio.

Steps to reproduce the behavior:

Start a program (eg. Chromium) with the default profile and make it output audio
Start another program (eg. Steam) with the default profile and make it output audio
Audio coming from Chromium continues playing, while Steam is completely silent.
With debug output enabled, I get the message "ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave".

Environment
Artix Linux, kernel 5.6.14-zen1-1-zen
firejail version 0.9.62
No other program interact with the affected program.

Additional context
Pulseaudio isn't installed.
firecfg --fix-audio did not fix the issue (and failed to execute properly).
Issue seems simillar to #3282, except I am not using pulseaudio at all.

Originally created by @fareyozz on GitHub (May 27, 2020). Original GitHub issue: https://github.com/netblue30/firejail/issues/3436 - Describe the bug. When starting software with firejail, only one can output audio. Any other program will be completely silent, and fail to start audio playback. - What did you expect to happen? All software should be able to output audio at the same time. - What changed calling `firejail --noprofile PROGRAM` in a shell? The program successfully outputs audio. Steps to reproduce the behavior: 1. Start a program (eg. Chromium) with the default profile and make it output audio 2. Start another program (eg. Steam) with the default profile and make it output audio Audio coming from Chromium continues playing, while Steam is completely silent. With debug output enabled, I get the message "ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave". **Environment** Artix Linux, kernel 5.6.14-zen1-1-zen firejail version 0.9.62 No other program interact with the affected program. **Additional context** Pulseaudio isn't installed. firecfg --fix-audio did not fix the issue (and failed to execute properly). Issue seems simillar to #3282, except I am not using pulseaudio at all.

gitea-mirror closed this issue

2026-05-05 08:50:08 -06:00

gitea-mirror commented

2026-05-05 08:50:10 -06:00

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@rusty-snake commented on GitHub (May 27, 2020):

So this only happens if program A and B are firejailed or also if only A?
If A is firejailed (with profile) and B without profile (=--noprofile) it works?
You say default profile do you mean default.profile or chromium.profile?

@rusty-snake commented on GitHub (May 27, 2020): - So this only happens if program A and B are firejailed or also if only A? - If A is firejailed (with profile) and B without profile (=`--noprofile`) it works? - You say default profile do you mean `default.profile` or `chromium.profile`?

gitea-mirror commented

2026-05-05 08:50:11 -06:00

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@fareyozz commented on GitHub (May 27, 2020):

So this only happens if program A and B are firejailed or also if only A?

It only happens if both are firejailed.

If A is firejailed (with profile) and B without profile (=--noprofile) it works?

Yes, B works properly with --noprofile.

You say default profile do you mean default.profile or chromium.profile?

I mean chromium.profile. Same with Steam, steam.profile was used (with more relaxed settings).
It also happens when I'm using a custom profile (attached below) with other programs.
Oddly enough, VirtualBox (with virtualbox.profile) seems unaffected by the issue.

custom.profile.txt
steam.profile.txt

@fareyozz commented on GitHub (May 27, 2020): > * So this only happens if program A and B are firejailed or also if only A? It only happens if both are firejailed. > * If A is firejailed (with profile) and B without profile (=`--noprofile`) it works? Yes, B works properly with --noprofile. > * You say default profile do you mean `default.profile` or `chromium.profile`? I mean chromium.profile. Same with Steam, steam.profile was used (with more relaxed settings). It also happens when I'm using a custom profile (attached below) with other programs. Oddly enough, VirtualBox (with virtualbox.profile) seems unaffected by the issue. [custom.profile.txt](https://github.com/netblue30/firejail/files/4691124/custom.profile.txt) [steam.profile.txt](https://github.com/netblue30/firejail/files/4691126/steam.profile.txt)

gitea-mirror commented

2026-05-05 08:50:13 -06:00

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@rusty-snake commented on GitHub (May 28, 2020):

Thats good news for you, because it can easily fixed. Can you try which option in steam.profile which is not in custom.profile cause this. (nogroups?)

@rusty-snake commented on GitHub (May 28, 2020): Thats good news for you, because it can easily fixed. Can you try which option in steam.profile which is not in custom.profile cause this. (`nogroups`?)

gitea-mirror commented

2026-05-05 08:50:14 -06:00

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@fareyozz commented on GitHub (May 28, 2020):

Seems like the "ipc-namespace" option is the culprit! Removing it from the profiles fixes everything. Thanks!

@fareyozz commented on GitHub (May 28, 2020): Seems like the "ipc-namespace" option is the culprit! Removing it from the profiles fixes everything. Thanks!

gitea-mirror commented

2026-05-05 08:50:15 -06:00

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@tostiheld commented on GitHub (Nov 15, 2020):

I am having a very similar problem, but commenting "ipc-namespace" does not seem to resolve the issue. Running with --noprofile does fix it, but I have no idea what the culprit is exactly. I have tried commenting different things in steam.profile, but frankly, I have no idea what I'm doing. Any advice on other things to try would be appreciated.

I am getting the exact same error message (ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave), by the way.

@tostiheld commented on GitHub (Nov 15, 2020): I am having a very similar problem, but commenting "ipc-namespace" does not seem to resolve the issue. Running with --noprofile does fix it, but I have no idea what the culprit is exactly. I have tried commenting different things in steam.profile, but frankly, I have no idea what I'm doing. Any advice on other things to try would be appreciated. I am getting the exact same error message (ALSA lib pcm_dmix.c:1089:(snd_pcm_dmix_open) unable to open slave), by the way.

gitea-mirror commented

2026-05-05 08:50:16 -06:00

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@rusty-snake commented on GitHub (Nov 15, 2020):

Comment everything in steam.profile (it should work then as --noprofile is effectively the same) and uncomment then line for line.

@rusty-snake commented on GitHub (Nov 15, 2020): Comment everything in steam.profile (it should work then as `--noprofile` is effectively the same) and uncomment then line for line.

gitea-mirror referenced this issue

2026-05-05 10:15:24 -06:00

[PR #2159] [MERGED] allow overriding of disable-mnt with noblacklist #4187

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Reference: github-starred/firejail#2159

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