Hi Andy
Thank you so much for your reply!
On 05/15/2011 10:31 PM, Andy Walls wrote:
On Sun, 2011-05-15 at 14:48 +0200, Ramon Hofer wrote:
Hi list
I have a WinTV PVR 500 and the "ivtv0: DMA TIMEOUT" problem which I'm
trying to solve for several months now.
After reading through wikis, forum and mailing posts but I'm still not
sure where the problem could be.
Here's the fix:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=d213ad08362909ab50fbd6568fcc9fd568268d29
I'm not sure what kernel version it went into, but it is certainly not
in kernel v2.6.32.
Is it correct that this is a kernel patch?
If so I'd have to download the kernel source, apply the patch and
compile it?
I have never done this before and I don't know if it wouldn't be easier
to just use a newer kernel?
I'll ask in the debian mailing list...
Maybe I'll have to send the card back
as it could be broken or maybe there's just a little configuration I
can't get right?
Nope. It's an ivtv driver bug in the way a DMA_TIMEOUT error condition
is handled.
The exact reason why you get DMA_TIMEOUT errors in the first place is a
function of your system hardware and its configuration and use. Usually
one of the PCI bridges is to blame. There is nothing that can usefully
be done in the ivtv driver about that, since it is a system level issue.
I'm just curious: When there's nothing that can be done, what does the
patch do?
If I understand it right the PCI bridge on my mainboard doesn't work as
it should.
So the driver just retries three times and ignores any failure?
Thanks again
Ramon
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