lars.bjorndal@xxxxxxxxxxxx (Lars Bjørndal) writes: > "Mikkel L. Ellertson" <mikkel@xxxxxxxxxxxxxxxx> writes: > >> Lars Bjørndal wrote: >>> lars.bjorndal@xxxxxxxxxxxx (Lars Bjørndal) writes: >>> >>>> Hi! >>>> >>>> I'm running Fedora F7, without X. I'm able to do 'mplayer <url>' for >>>> one user at a time. However, I'm not able to do 'mplayer <url>' for >>>> one user, and then 'mplayer <another-url>' as another user. Then I get >>>> the following error message: >>>> >>>> [AO_ALSA] alsa-lib: pcm_dmix.c:831:(snd_pcm_dmix_open) unable to >>>> create IPC semaphore >>>> [AO_ALSA] Playback open error: Permission denied >>>> >>>> It's not important to me to play mplayer that way, however, I want to >>>> be able to run speech-dispathcer (which, BTW should have an rpm pacage >>>> for Fedora) and play mplayer at the same time. How could I solve this >>>> permission problem? >>>> >>>> I've tried to put in /etc/security/console.perms.d/50-default.perms: >>>> >>>> <console> 0666 <sound> 0600 root, >>>> >>>> and ls -al /dev/audio gives: >>>> >>>> crw-rw-rw-+ 1 lrs root 14, 4 2007-11-29 10:00 /dev/audio >>>> >>>> Lars >>> >> Dumb question - is the first user's mplayer closed before the second >> user tries to run their copy of mplayer? I am not familiar with the >> error message, but I am guessing that the problem is that something >> has a connection to the mixer open, and so you can not open another. >> If that is the case, you may be able to do something using the jack >> add-ons to alsa. > > To your question: I tried to run two instances of mplayer at the same > time. And: I'm able to run two mplayer sessions at the same time from > the same user. The problem raises if I first start mplayer for user1, > then switches to user2 and start mplayer. Mplayer is still running on > user1. Any suggestions? > > Lars I found the solution here: http://mpd.wikia.com/wiki/Configuration. I created the file /etc/asound.conf, with the following content: pcm.dmixer { type dmix ipc_key 1024 ipc_key_add_uid false ipc_perm 0666 # mixing for all users slave { pcm "hw:0,0" period_time 0 period_size 1024 buffer_size 8192 rate 44100 } bindings { 0 0 1 1 } } pcm.dsp0 { type plug slave.pcm "dmixer" } pcm.!default { type plug slave.pcm "dmixer" } pcm.default { type plug slave.pcm "dmixer" } ctl.mixer0 { type hw card 0 } Lars
