[Bug 252305] New: Sound gone in ALSA apps after KDE "Switch User".

[Jeff Barry]

https://bugs.kde.org/show_bug.cgi?id=252305

           Summary: Sound gone in ALSA apps after KDE "Switch User".
           Product: kde
           Version: unspecified
          Platform: Slackware Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: JeffBatHome at myLetters.US


Version:           unspecified (using KDE 4.4.3) 
OS:                Linux

Hi,

If I am in a KDE session and I do a "Switch User" to bring up a new desktop
then sound disappears for SOME applications.  It is gone in the new session,
and it is still gone when I return to the original session.  My guess is that
KDE wants to switch the sound over to the new session (a good idea) but it
doesn't do it right.  Nor does KDE restore sound when returning to the original
session.

I can get sound back to the affected applications by rebooting or doing an
"alsactl init" from a command line.  That alsactl restores sound suggests that
this is an interaction between Switch User and ALSA.

Here are some applications which ARE affected by this problem:

    Firefox
    Xine
    Mplayer
    audacious

Here are some applications which are NOT affected:

    Amarok
    KDE event notification

(Note that whatever Amarok is playing in the original session continues to play
in the new session, which is also a bug.)

This is a repeatable failure.  I lose sound in the affected applications every
time I do the "Switch User".  It does not matter which user I switch to.  I am
running Slackware 13.1, the latest, with a 2.6.33.4-smp kernel and KDE 4.4.3.


Reproducible: Always

Steps to Reproduce:
Play something with one of the affected applications I mentioned then click
through "Application Launcher" --> "Leave" --> "Switch User", and log in.  It
does not matter which user you switch to.

Actual Results:  
The sound will not work in the affected applications nor does it work when you
return to the original session.


Expected Results:  
The ability to play sounds from the current session (and only the current
session) should just work whatever session I am in and regardless of what
sessions I have been in.


Fixed by The Microsoft Solution (Just reboot) or by running "alsactl init" from
the command line.

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