[linux-dvb] Re: dvb driver corrupts video memory?

[Olaf Titz <olaf@bigred.inka.de>]

I wrote:

> > Hm, from your descriptions I assume that you're using the plain overlay
> > mode without the "v4l" X module loaded.
>
> wrong, but I have tried it with and without the module, and got the
> problem in both cases (but it may be that I haven't rebooted the

I was wrong here. Turns out that I did not use Xvideo at all because
of (my not understanding of) my weird setup.
I had the bttv module as /dev/video0 and Xv port 69, the dvb-ttpci
module as /dev/video1 and Xv port 70, and the Matrox backend scaler as
Xv port 71. Swapping around the numbers and playing with xawtv options
reveals that it seems to not use the port 71 at all, and
"-c /dev/video1" turns off Xv anyway (RTFM :-()

Now I've swapped the cards (logically) and made DVB the first Xv port,
and now xawtv uses it properly. No broken images yet.

What remains is that I got these distortions (and the apparent
off-by-one image location) only when using DVB, but the part which
writes into memory was plain overlay mode.

Olaf



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