I'm still running 2:0.27.0+fixes.20140324 (installed in a hardware upgrade 2 years ago) and the backend audio input just suddenly started recording hiss for no reason after working for 2 years. Arecord and aplay still worked fine though. I put PULSE_INTERNAL=1 in the environment in the systemd .service page for the backend and the problem went away.
THANKS!!! :) -- 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 : mythbuntu-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~mythbuntu-bugs More help : https://help.launchpad.net/ListHelp
