[mythtv] Ticket #2238 Muting v4l-compat cards (saa7134)

Petr Stehlik pstehlik at sophics.cz
Sun Oct 1 17:55:11 UTC 2006


John Pilkington píše v Ne 01. 10. 2006 v 18:36 +0100:
> I'd like to jump in here with another v4l problem - please point me to a 
> better place if it's not appropriate.

> 2006-10-01 17:48:57.173 TVRec(3): Changing from None to WatchingLiveTV
> 2006-10-01 17:48:57.173 TVRec(3): HW Tuner: 3->3
> VIDIOCGCHAN: Invalid argument

I got three cards (DVB-S, PVR 150 and BT878 driven Pinnacle PCTV Pro) so
it took me a couple days after upgrading to 0.20 to find out that the
BT878 does not record sound at all (should be using /dev/dsp as sound
source). It worked in 0.19. 

Backend reports problem with opening /dev/vbi and also the VIDIOCGCHAN
invalid argument. What's even worse - the kernel crashes frequently
(never happened before).

I know that kernel crash is generally not an application's fault but the
invalid argument I've seen in previous post let me reply with my
experience with muted(?) v4l card.

Petr

P.S. I admit I upgraded kernel from 2.5.15 to 2.5.16 a week ago and I am
not 105% certain that the kernel upgrade didn't cause part of this
problem. Will check by downgrading Myth to 0.19 but wanted to report
sound problems earlier.




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