[Kwintv] Re: The old KWinTV hangs with DMA enabled

[Andras Mantia]

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Hi,

On Sunday 22 February 2004 11:07, Zsolt Rizsanyi wrote:
> Turning of the DMA on the hard drive did not really help just lessened the
> chance of the freeze (and it could work even for hours).

Might be the case here as well, but I can't tell it right now. I've found a 
"solution" to have both DMA and no crash by setting the DMA to UDMA3, which 
is of course slower than the UDMA5 supported by the motherboard and the HDD. 
This way I couldn't freeze the PC even when doing a "hdparm -t /dev/hda", 
while with UDMA4 or above it always hanged. 

> I have contacted the video4linux list, but they could not help, because it
> is a hardware bug. They said only the manufacturer can help.
Yes, it looks like a hardware problem, but i'm wondering if they can solve the 
problem with a BIOS update, isn't it possible to solve also from the drivers?

> A developer of the windows driver replied to my query and suggested to try
> out some bios settings, and to set the latency timer of the tv device to
> 10. (though I could already find this info in various FAQs on the NET)
> That did help, but it would still freeze when there was heavy hard drive
> io.
Good hint, I should look at it, although I don't recall seeing such settings 
in this BIOS.

> So this would be my story, to cheer you up ;)
Thanks to sharing it with me. ;-)

Andras

- -- 
Quanta Plus developer - http://quanta.sourceforge.net
K Desktop Environment - http://www.kde.org
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