If flash player is active, other user can't play any sound

[Jasa Bartelj]

Binary package hint: flashplugin-nonfree

I've been experiencing this issue for a while now, on i386 (10.1.85.3ubuntu1) and amd64 (10.2.161.22 from Adobe Labs).

When my user has a tab open with a paused web video (e.g. youtube), another user cannot playback sound.
To be clear, my user:
> uid=1000(user) gid=1000(user)
> groups=1000(user),4(adm),20(dialout),24(cdrom),29(audio),30(dip),40(src),
> 46(plugdev),104(fuse),106(lpadmin),112(netdev),121(admin),122(sambashare),
> 125(vboxusers)
The user experiencing this:
> uid=1001(affected) gid=1001(affected)
> groups=24(cdrom),25(floppy),29(audio),44(video),46(plugdev),112(netdev),
> 1001(affected)

The guest session is also affected and can be used to reproduce this bug:
1. Play any video on youtube, pause it.
2. Go to guest session.
3. Flash video sites will be mute; desktop playback software will either not play (totem) or be also muted (vlc).

Don't know whether this helps but here it is anyway. :P
$ sudo lsof /dev/snd/*
lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/user/.gvfs
      Output information may be incomplete.
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
pulseaudi 1891 user mem CHR 116,8 4232 /dev/snd/pcmC0D0p
pulseaudi 1891 user 20u CHR 116,10 0t0 4236 /dev/snd/controlC0
pulseaudi 1891 user 26u CHR 116,10 0t0 4236 /dev/snd/controlC0
pulseaudi 1891 user 35u CHR 116,8 0t0 4232 /dev/snd/pcmC0D0p
pulseaudi 2499 guest 20u CHR 116,10 0t0 4236 /dev/snd/controlC0
pulseaudi 2499 guest 26u CHR 116,10 0t0 4236 /dev/snd/controlC0