[mythtv-users] Consistent flicker with ivtv-fb + PVR-350 decoding

[Stefan Haflidason]

On 3/4/06, Al McIntosh <junkmail at allanmcintosh.com> wrote:
>
> Stefan Haflidason wrote:
>
> > On 3/4/06, *Al McIntosh* <junkmail at allanmcintosh.com
> > <mailto:junkmail at allanmcintosh.com>> wrote:
> >
> >     Stefán Hafliðason wrote:
> >
> >     >Hi all,
> >     >
> >     >I'm using mythtv 0.19 with a PVR-350. Recently, I think since I
> >     upgraded
> >     >to 0.19, I have been getting a constant flickering when watching
> >     live tv
> >     >through the tuner or s-video inputs. The flickering might be better
> >     >described as a fairly regular flash of black.
> >     >
> >     >I am also getting the following errors many times in
> >     /var/log/messages:
> >     >
> >     >ivtv0 warning: prep_user_dma: SG_length 400 page_count 400 still
> >     full?
> >     >ivtv0-osd warning: ivtvfb_prep_dec_dma_to_device, Error with
> >     >get_user_pages: 1638400 bytes, 400 pages returned
> >     >ivtv0-osd warning: Error: prep osd dma to device rc=-5
> >     >ivtv0-osd warning: DMA xfer from b7318008 of 1638400 bytes failed
> >     with
> >     >(-5) offset = 0x0, total 1638400
> >     >
> >     >I am currently running:
> >     >
> >     >kernel 2.6.10-r9 (Gentoo),
> >     >PVR-350,
> >     >ivtv 0.4.2 - I have just tried 0.4.0, no difference
> >     >
> >     >The flickering only occurs when using the PVR-350's decoder to
> watch
> >     >something on either input (currently static on the tuner (limited
> >     access
> >     >to aerial) and tv-out from another computer on the s-video input).
> >     >Watching a previous recording (with no flicker) works fine.
> >     >
> >     >Thanks,
> >     >
> >     >Stefan.
> >     >
> >     >
> >     >
> >     >
> >     >
> >
> >     You may consider taking this topic over to ivtv mailing lists.
> >
> >
> > Will do; apologies for the mis-posting.
>
>
> I don't think apologies are required. Was thinking for your sake you may
> get better results. :)
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>

At the time it seemed like a very silly mistake to be blaming myth for that
problem. However, after seeing this thread on the ivtv-devel list (
http://www.gossamer-threads.com/lists/ivtv/devel/24487?page=last ) it looks
like I might be back here again soon :-) as they point the finger at myth's
use of overlays.