I ran both commands after logging in as myself, starting a flash video, switching to another user, starting a flash video there, then switching back directly to myself (this did replicate the problem). I then ran the two commands as myself.
Looks like flash is using pulseaudio (only pulseaudio has the files open) $ sudo fuser -v /dev/snd/* [sudo] password for cgw: USER PID ACCESS COMMAND /dev/snd/controlC0: cgw 1441 F.... pulseaudio jodi 1794 F.... pulseaudio /dev/snd/pcmC0D0p: cgw 1441 F...m pulseaudio ck-list-sessions returned this: $ ck-list-sessions Session2: unix-user = '1000' realname = 'Cory Williams' seat = 'Seat1' session-type = '' active = TRUE x11-display = ':0' x11-display-device = '/dev/tty7' display-device = '' remote-host-name = '' is-local = TRUE on-since = '2010-11-29T20:38:29.161938Z' login-session-id = '' Session4: unix-user = '1001' realname = 'Jodi Poniewaz' seat = 'Seat1' session-type = '' active = FALSE x11-display = ':1' x11-display-device = '/dev/tty8' display-device = '' remote-host-name = '' is-local = TRUE on-since = '2010-11-29T20:39:26.034796Z' login-session-id = '' idle-since-hint = '2010-11-29T20:40:03.123122Z' -- Pulseaudio stops working when switching users https://bugs.launchpad.net/bugs/649507 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs