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SElinux sandbox without audio (no sound)

asked 2013-09-20 03:26:44 -0600

erik gravatar image

updated 2014-04-11 16:39:17 -0600

remjg gravatar image

I am using Fedora 17 and Gnome Shell (Gnome 3).

I have two displays. Now I want to play videos fullscreen stretched all over both displays. I tried it with mplayer and gnome-mplayer with the option --fullscreen, but only one of the displays is used. I have to manually resize the window to have it fill both displays.

As a workaround I started gnome-mplayer in a SElinux sandbox, that has the size of both displays together.

  • First problem: I have to start this sandbox-player on the left screen for the sandbox to be visible on both displays. If I start the sandbox-player on the right screen I have to manually drag and drop it to the left screen, otherwise I can see only the left part of the video (displayed on the right screen).
  • Second problem: I hear no sound. Which option do I have to set for letting the audio through the sandbox?
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answered 2013-09-20 04:42:33 -0600

domg472 gravatar image

updated 2013-09-20 04:43:46 -0600

As for the second part of your question:

I have just tested this: (sandbox -X -t sandbox_web_t gnome-mplayer test1.webm)

By default sound did not work due to the properties of sandbox technology.

However i managed to get it going by going to the mplayer preferences menu and select the actual audio output device rather than leaving it on "Default"


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Thanks for this answer. But it would be nicer to not have to change the gnome-mplayer preferences. Because I want to use this player for normal playback (without sandbox), too. Is there somewhere a list of types (other than the short one in the man page)? Or isn’t it a problem of the sandbox types at all?

erik gravatar imageerik ( 2013-09-22 00:17:59 -0600 )edit

This is not a issue with sandbox types i believe. It is an issue with how sandbox uses namespaces. I Think it cannot get to the pulseaudio socket in your home directory or something

domg472 gravatar imagedomg472 ( 2013-11-22 07:55:14 -0600 )edit

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Asked: 2013-09-20 03:26:44 -0600

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Last updated: Sep 20 '13