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

Stefįn Haflišason stefan at styrmis.org
Sat Mar 4 00:23:37 UTC 2006


Stefįn Haflišason 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.
>
>
>
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>  
>
Typo: kernel version should be 2.6.12-r9 (Gentoo).


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