Public bug reported:

Binary package hint: udev

Tested wit udev 147~-6

If you play sound, for example, from Rythmbox, then switch to a
different vt logged in as a different user, the sound gets cut off.

This is caused by the console kit acl integration.  The user playing
sound is a member of the audio group, but because udev acl also gave him
an acl user level rw permission when the audio starts, then removes that
specific permission when console is switched, the audio gets cut off.

In Jaunty, when dev permission was handled by policykit, I was able to
work around this by granting the audio playing user permission there,
and therefore, the acl entry was never removed.  Now, however, the only
work-around I found is to comment out sound devices category from
/lib/udev/70-acl.rules,  and therefore, the only permission that is ever
used to play audio is the group permission access, which does not change
when changing vt/users.

** Affects: udev (Ubuntu)
     Importance: Undecided
         Status: New

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audio cuts off when switching vt
https://bugs.launchpad.net/bugs/480261
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