On Sunday 10 September 2006 20:57, Simon John wrote:
> Hans Verkuil wrote:
> > On Sunday 10 September 2006 19:40, Simon John wrote:
>
> [snip]
>
> >> This is a KT266 motherboard, which I think may have issues with
> >> DMA on Linux, although nothing else (SATA, 1394, USB2, IDE,
> >> gigabit....) suffers, it does seem to be sharing IRQ11.
> >
> > I have a very similar PVR250 card which works great. But you
> > mention the KT266 chipset: I think that is one of the 'bad'
> > chipsets that simply do not work well (or at all) with the PVR
> > cards. Windows also has issues AFAIK. Try the card in another PC
> > with a different chipset (preferably non-VIA chipset or a modern
> > one (e.g. no older than 2 years I think).
>
> yeah, i had it in an intel chipset pc (p4-ht, so only a couple of
> years old) and don't recall the problems with dma, just the tuner
> didn't seem to work with weak signals from the roof antenna.
>
> also worked off a sis chipset pc from a tivo box (windows).
>
> i might swap it out, hehe maybe i'll make the xp box into a fc5 box,
> although that is a last resort really and i'd prefer a solution.
>
> there's deals on sempron64 mobo+cpu's, are there issues with 64-bit?
> i guess a newer motherboard means less pci cards to share irqs....
No, it works fine with 64-bit.
>
> >> I hate to say it, but the same card has worked fine for years in
> >> two PCs using WinXP, and the output quality seemed to be much
> >> better - I expect the Windows drivers used some proprietary
> >> interlacing like the Philips WebCams.....?
> >
> > As far as I know there is no quality difference between Windows and
> > Linux drivers for this card. The sole exception were problems with
> > certain Samsung tuners that are solved by now.
>
> well i can definitely see a difference, i remember under windows
> having a 12000 bitrate, under linux it's 9000 i think.
If you increase the bitrate to 12000 as well for linux, then the result
should be equal from the Windows driver.
Hans
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