Thanks for the feedback. Some comments below.

> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:ivtv-devel-
> [EMAIL PROTECTED] On Behalf Of Jelle
> Sent: 06 February 2005 03:23
> To: [email protected]
> Subject: [ivtv-devel] [PATCH] Re: Re: Problems with X TV-OUT with
> ivtvdev.. PVR-350
> 
> On Fri, 04 Feb 2005 18:11:37 -0500, Jelle wrote:
> 
> >
> > Thanks for the prep_frame/vsync tip John, I hope I have some time this
> > week-end to give it a try.
> 
> Ahh, much better. It looks almost perfect now. The video playback is
> very smooth, especially compared to what it looked like before. Sometimes
> frames appear to be skipped, but that is gone when I change mythtv
> playback to 'use video as timebase' (so maybe it's an audio sample rate
> mismatch thing).
> 
> Two relatively minor issues remain:
> 
> 1) Once or twice I found that the video did look a bit jittery. Stopping
> the playback and restarting it solved it. I could not reproduce the
> behaviour later.
> 
> 2) Sometimes there seems to be some tearing in the top half of the screen.
> It's not always visible and not as disturbing (to me) as the
> tearing with the unpatched driver, but I sometimes see it and it does look
> like it shouldn't be there. Maybe the vsync arrives a little late
> sometimes?

Most likely that the scheduled process starts a little late sometimes so the
dma happens late. 

> 
> Patch below. It this safe to do? Why is the transfer chopped up to
> begin with? Was it a stability issue or something?

Yes this was a stability thing. Chris believed this was more stable. I've
never seen any problems though. It looks like the sync stuff is just in 0.3.
I'll have a think about whether to make it an option but with the 0.3 driver
as it is the behavior is definitely wrong.






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