[mythtv-users] Hauppage Nova-TD and failed recordings

[HP-mini]

On Tue, 2013-04-16 at 18:41 +0100, Simon Waldman wrote:
> Hi list,
> 
> 
> My setup is as follows:
> 
> 
> UK, recording only from Freeview (DVB-T) and Freeview HD (DVB-T2).
> 
> 1x Hauppage Nova-TD dual tuner USB stick
> 
> 1x Some other USB stick with a single HD tuner (I forget what it is,
> but I don't think it's important here)
> 
> 
> 
> Mythbuntu 12.04.2 LTS with up to date 0.26-fixes.
> 
> Listings from tv_grab_uk_rt, except for a few channels that I use EIT
> for.
> 
> 
> 
> All has worked for some years. Since I upgraded to 0.26, I've been
> getting quite a lot of failed (0-byte) recordings - perhaps 30% of all
> recordings fail. These only ever happen on the Nova-TD stick. They
> *seem* to happen more on one multiplex than others, but they are not
> restricted to that multiplex (and the favouring of that one that could
> be random chance / my imagination). 
> 
> 
> 
> I have Mythwelcome running, and have the machine shutting down when it
> has nothing to do for a long time and starting again 5 minutes before
> a recording. I mention this because the pattern often seems to be that
> the first recording after it starts up fails, but subsequent ones
> succeed. However, this is not reliably true.
> 
> 
> Relatedly, when I try with LiveTV, I usually only get Partial Lock
> from this card at first - but if I change away from it to the HD tuner
> and then back again, it works fine.
> 
> I've tried deleting each of the dual tuners in turn to see if one of
> them is dud. No use. I've tried putting up the various timeouts and
> tuning delays, no use. I've tried changing Fast Tuning between "Live
> TV Only" and "Always", but it made no difference.


I think you have to disable fast tuning for nova-tD & it needs a long
timeout.
See the LinuxTV.org page

Can you try an expt with forced cold start?
After box starts down (via auto shudown)..pull out & replug the tuner
stick.

There were reports of these devices not working properly after
suspend/hiberation.
If the USB port is not powering off the tuner then it could be in warm
start mode on box restart.

There were some recent threads with USB standby power
debugging/disabling.

Does your mobo support USB standby power?