bless you! Although I don't really understand what's going on here, I can confirm the problem and the workaround.
You're my hero! I was running MythTV on Ubuntu 10.4 with OSS for 2 years, but did not get the beast to work with ALSA until right now. -- You received this bug notification because you are a member of Mythbuntu Bug Team, which is subscribed to mythtv in Ubuntu. https://bugs.launchpad.net/bugs/633452 Title: MythTV Backend fails to record audio, due to PulseAudio Status in “mythtv” package in Ubuntu: Confirmed Bug description: Binary package hint: mythtv I have my MythTV backend set up to record audio directly from an ALSA device provided by my capture card. Most attempts to record produce the following errors in mythbackend.log: 2010-09-08 11:42:36.208 AudioInALSA(tuner) Error: pcm open failed: Device or resource busy 2010-09-08 11:42:36.401 NVR(/dev/tuner/video) Error: Failed to open audio device ALSA:tuner 2010-09-08 11:42:36.459 NVR(/dev/tuner/video) Error: Failed to init audio input device I have determined that this is due pulse's support for re-routing ALSA access to the pulseaudio daemon. This behavior doesn't make much sense for the MythTV backend, since pulseaudio is a user-level daemon by default and mythbackend is system-wide and should work even when no users are logged in. Therefore it's best to bypass pulseaudio in mythbackend. The environment variable PULSE_INTERNAL can do that. If mythbackend is started with PULSE_INTERNAL=1 in its environment, the problem goes away and it records sound successfully every time. What I'm doing right now is I edited /etc/init/mythtv-backend.conf and replaced exec /usr/bin/mythbackend --logfile /var/log/mythtv/mythbackend.log --user mythtv with script PULSE_INTERNAL=1 exec /usr/bin/mythbackend --logfile /var/log/mythtv/mythbackend.log --user mythtv end script To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mythtv/+bug/633452/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~mythbuntu-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~mythbuntu-bugs More help : https://help.launchpad.net/ListHelp
