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I'm having problems with image quality with ivtvfb kernel module.

The image looks "grainy" with both X server and recorded video that I
try to play on the S-video tv-out of my PVR-350 card. The entire
screen has a uniform graininess that, if I look closely, looks like it
is moving from bottom to top. I'm using kernel 2.6.26-ARCH i686.

I appreciate any suggestions about what it might be or how I could
troubleshoot further.

Thanks,
Dirk

Here's what I get when I modprobe ivtvfb:
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Mar 8 20:33:34 obmyth ivtvfb0: Framebuffer at 0xe1510000, mapped to
0xf9a10000, size 1665k
Mar 8 20:33:34 obmyth ivtvfb0 info: ivtvfb_check_var
Mar 8 20:33:34 obmyth ivtvfb0 info: Display size: 720x480 (virtual
720x480) @ 32bpp
Mar 8 20:33:34 obmyth ivtvfb0 info: Display position: 1, 1
Mar 8 20:33:34 obmyth ivtvfb0 info: Display filter: on
Mar 8 20:33:34 obmyth ivtvfb0 info: Color space: RGB
Mar 8 20:33:34 obmyth ivtvfb0 info: ivtvfb_get_fix
Mar 8 20:33:34 obmyth ivtvfb0 info: ivtvfb_set_par
Mar 8 20:33:34 obmyth ivtvfb0 info: ivtvfb_set_var
Mar 8 20:33:34 obmyth ivtvfb0 info: Display size: 720x480 (virtual
720x480) @ 32bpp
Mar 8 20:33:34 obmyth ivtvfb0 info: Display position: 1, 1
Mar 8 20:33:34 obmyth ivtvfb0 info: Display filter: on
Mar 8 20:33:34 obmyth ivtvfb0 info: Color space: RGB
Mar 8 20:33:34 obmyth ivtvfb0 info: ivtvfb_get_fix
Mar 8 20:33:34 obmyth ivtvfb0 info: Set blanking mode : 0
Mar 8 20:33:34 obmyth ivtvfb0: Framebuffer registered on ivtv card id 0
Mar 8 20:33:35 obmyth ivtvfb0 info: Set blanking mode : 0
Mar 8 20:33:35 obmyth ivtvfb0 info: ivtvfb_check_var
Mar 8 20:33:35 obmyth ivtvfb0 info: ivtvfb_check_var
Mar 8 20:33:35 obmyth ivtvfb0 info: Display size: 720x480 (virtual
720x480) @ 32bpp
Mar 8 20:33:35 obmyth ivtvfb0 info: Display position: 1, 1
Mar 8 20:33:35 obmyth ivtvfb0 info: Display filter: on
Mar 8 20:33:35 obmyth ivtvfb0 info: Color space: RGB
Mar 8 20:33:35 obmyth ivtvfb0 info: ivtvfb_check_var
Mar 8 20:33:35 obmyth ivtvfb0 info: ivtvfb_check_var
Mar 8 20:33:35 obmyth ivtvfb0 info: Display size: 720x480 (virtual
720x480) @ 32bpp
Mar 8 20:33:35 obmyth ivtvfb0 info: Display position: 1, 1
Mar 8 20:33:35 obmyth ivtvfb0 info: Display filter: on
Mar 8 20:33:35 obmyth ivtvfb0 info: Color space: RGB
Mar 8 20:33:35 obmyth ivtvfb0 info: ivtvfb_set_par
Mar 8 20:33:35 obmyth ivtvfb0 info: ivtvfb_set_var
Mar 8 20:33:35 obmyth ivtvfb0 info: Display size: 720x480 (virtual
720x480) @ 32bpp
Mar 8 20:33:35 obmyth ivtvfb0 info: Display position: 1, 1
Mar 8 20:33:35 obmyth ivtvfb0 info: Display filter: on
Mar 8 20:33:35 obmyth ivtvfb0 info: Color space: RGB
Mar 8 20:33:35 obmyth ivtvfb0 info: ivtvfb_get_fix
Mar 8 20:33:36 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:36 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
1382400 bytes, 338 pages
Mar 8 20:33:36 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:36 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
63428 bytes, 16 pages
Mar 8 20:33:37 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:37 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
756068 bytes, 185 pages
Mar 8 20:33:37 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:37 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
1382400 bytes, 338 pages
Mar 8 20:33:37 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:37 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
63428 bytes, 16 pages
Mar 8 20:33:37 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:37 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
1382400 bytes, 338 pages
Mar 8 20:33:37 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:37 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
1382400 bytes, 338 pages
Mar 8 20:33:39 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:39 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
1382400 bytes, 338 pages
Mar 8 20:33:44 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:44 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
1382400 bytes, 338 pages
Mar 8 20:33:44 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:33:44 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
1382400 bytes, 338 pages
Mar 8 20:34:00 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:34:00 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
91076 bytes, 23 pages
Mar 8 20:35:00 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:35:00 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
91076 bytes, 23 pages
Mar 8 20:36:00 obmyth ivtvfb0 info: IVTVFB_IOC_DMA_FRAME
Mar 8 20:36:00 obmyth ivtvfb0 info: ivtvfb_prep_dec_dma_to_device,
91076 bytes, 23 pages

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