'Twas brillig, and duportail at 12/04/11 19:20 did gyre and gimble: > Op 12-4-2011 18:53, Tanu Kaskinen schreef: >> On Tue, 2011-04-12 at 12:30 -0400, Sean McNamara wrote: >>> Hi, >>> >>> On Tue, Apr 12, 2011 at 12:15 PM, duportail<poort at telenet.be> wrote: >>>> Try to test the new xubuntu 11.04 with kde on a multi-user system. >>>> The first user (for example user1) can log in and gets a default >>>> sink from >>>> pulse. >>>> The second user(for example user2) that will log in gets a auto_null >>>> because >>>> pulse did not found any sinks. >>>> If i log out user1, than user2 can get a default sink by kill and start >>>> pulse. >>>> Where should be the reason? >>> This is the "classic" multi-user problem: you're using a soundcard >>> without hardware mixing, so only one ALSA application can take direct >>> control of the hardware device at a time. user1's pulseaudio daemon >>> takes control of it, so obviously user2's PA daemon will just get >>> "Device or resource busy" when trying to snd_pcm_open() on hw:0 (for >>> example). This problem has existed since ALSA existed. There's no >>> direct fix without scrapping the API and rewriting it. >> Actually, this situation is supposed to be handled just fine (unless >> duportail expects both users to be able to use the audio hw >> simultaneously, which he doesn't mention). If this doesn't work, xubuntu >> is broken. Some things that can cause this problem: the users are in the >> "audio" group, consolekit isn't running or consolekit's udev-acl isn't >> in use. >> > Maybe xubuntu is broken.I will wait until further releases Make sure that ck-list-sessions reports correctly that only the active user is actually active. Also check the user groups as Tanu reported. But all in all, this *should* be handled correctly (and certainly is on other systems) Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited [http://www.tribalogic.net/] Open Source: Mageia Contributor [http://www.mageia.org/] PulseAudio Hacker [http://www.pulseaudio.org/] Trac Hacker [http://trac.edgewall.org/]
