[mythtv-users] ALSA sound device not available on first attempt to use after boot

[Will Dormann]

Hi folks,

After having updated my MythTV box a short while back to remain in a 
supported version of Ubuntu, I noticed one quirk that didn't seem to be 
there before:

On first boot, the very first attempt to play a recording will result in 
no audio, and a dialog that pops up in the top right corner of the 
screen.   If I exit the video and play it again, the sound is fine.  And 
is fine for every single recording until the next system reboot.

Given that the system reboots are few and far between, this hasn't 
bothered me much.  But, I suppose I would prefer it to work properly 
right after a clean boot.


MFE log from the first recording playback attempt:

mythfrontend[1945]: I CoreContext audio/audiooutputbase.cpp:823 
(Reconfigure) AOBase: Opening audio device 'hdmi:CARD=NVidia,DEV=1' ch 
2(6) sr 48000 sf signed 16 bit reenc 0
mythfrontend[1945]: E CoreContext audio/audiooutputalsa.cpp:464 
(OpenDevice) ALSA: snd_pcm_open("hdmi:CARD=NVidia,DEV=1"): Device or 
resource busy



For attempts after that:

mythfrontend[1945]: I CoreContext audio/audiooutputbase.cpp:823 
(Reconfigure) AOBase: Opening audio device 'hdmi:CARD=NVidia,DEV=1' ch 
2(6) sr 48000 sf signed 16 bit reenc 0
mythfrontend[1945]: W CoreContext audio/audiooutputalsa.cpp:775 
(SetParameters) ALSA: Requested 500000us got 341333 buffer time



Any thoughts as to why the "Device or resource busy" on only the first 
attempt to play a recording after bootup?


Thanks
-WD