RE: Yuan MPC788 and MPC583

["Paul" <Paul@xxxxxxxxxxxxxxx>]

> -----Original Message-----
> From: video4linux-list-bounces@xxxxxxxxxx 
> [mailto:video4linux-list-bounces@xxxxxxxxxx] On Behalf Of 
> Bernard Jungen
> Sent: 30 January 2008 12:55
> To: video4linux-list@xxxxxxxxxx
> Subject: Re: Yuan MPC788 and MPC583
> 
> On Wed, Jan 30, 2008 at 10:32:43AM -0000, Paul wrote:
> > On a freshly booted system, xawtv works - shows a picture when it's 
> > tuned in, shows snow when it's not.
> > After running mplayer for a digital station, xawtv just 
> shows a black 
> > screen (when it's tuned in or not).
> > xawtv will continue to show a black screen until I reboot 
> the computer.
> > This fault is common to both the MPC788 and MPC583, so I 
> doubt it is a 
> > frontend issue.
> > 
> > When the driver is in this broken state, xawtv shows a 
> proper TV image 
> > for an instant as it quits.
> > This image changes with time so I guess this means 
> something is still 
> > working.
> > tuner-xc2028.c goes through the motions of loading the analogue 
> > firmware and does not report any errors.
> > 
> > Given this, I am starting to think that the problem is in the cx88 
> > code, but I've no idea where to start looking.
> 
> It's a mplayer problem IIRC. And possibly a xawtv weakness. 
> Snapshots, overlay mode, and my own simple plugin do work 
> though. This is with bttv.
> 
> Cheers,
> 
> Bernard.
> 
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Hi,

It's looking like mplayer is causing the fault.
tzap doesn't stop xawtv working.
Even tzap then cat /dev/dvb/adapter0/dvr0 doesn't break it.
Both 'mplayer dvb://chn' and tzap then 'mplayer /dev/dvb/adapter0/dvr0'
stop xawtv from working.

That said, user space programs shouldn't really be able to break kernel
drivers.
Does anyone know what mplayer does other than read
/dev/dvb/adapter0/dvr0?


Thanks
Paul


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