[mythtv-users] Workarounds for multiple HVR-950Q not tuning

[Andrew Cagney]

Hi,

I've also hit the problem described in "multiple HVR-950Q usb tuners"
(http://mythtv.org/pipermail/mythtv-users/2009-November/269626.html)
where one of the tuners may not work after a power-cycle (both inside
or outside of mythtv so a driver problem).  The symptom I see is
"Partial Lock" when attempting to use live-tv.

The h/w is Acer Revo R1600 and OS is:
  Linux tv-desktop 2.6.31-17-generic #54-Ubuntu SMP Thu Dec 10
17:01:44 UTC 2009 x86_64 GNU/Linux

Poking at I've found that both the below seem to get past the problem:

- Powercycle just the tuners vis:
  - stop mythtv's backend
  - unplug both tuners
  - plug both tuners back in
  - start mythtv's backend
  (since all this takes time, it points to a race condition)

- delay the driver's load until after the machine is up vis:
  - add "blacklist au0828" to a file in /etc/modprobe.d/
  - edit /etc/init/mythtv-backend.conf's "script" section to read like:
	date > /tmp/au0828.log 2>&1
	sleep 10
	modprobe -v au0828 >> /tmp/au0828.log 2>&1
	sleep 10
	exec /bin/su -c "/usr/bin/mythbackend $ARGS" $USER
  (which is more automated)

Any one know if this was reported upstream, if not I guess I post
something more detailed to linux-media at .

Andrew