I believe it may sound weird, but I have successfully ran 3 cards
recording at 32.000 Hz each stereo, 16 bits. I left it running for
24hours to check if it was just luck and it never crashed!
The configuration I have used with three cards sums up to 384K per
second running on the PCI bus.
Now my test continues and I have added another two cards, reaching the
limit of my slots, 5 cards.
When I start the arecord on all of them, it doesn't crash, but it's
recording at 8000 Hz 8bits mono by default.
I then tried running arecord at 16000 Hz, stereo, 16 bits, and it
crashed when I started the 5th card.
What's weird is that with this configuration on the bus we should have
only 320k per second.
It appears to me that it is crashing when I am increasing the summed
sample rate. But then it doesn't make sense because 320k is less than
384k.
Do you have any idea?
Thanks,
Franc
On Wed, 2002-09-18 at 12:14, Takashi Iwai wrote:
> At 17 Sep 2002 21:39:01 +0200,
> Francesco Rossi wrote:
> >
> > Some more info, I finally ran into a kernel message:
> > CPU 0: Machine Check Exception: 0000000000000004
> > Bank 0: a200000084010400
> > Kernel panic: CPU context corrupt
> > In idle task - not syncing
>
> this is really weird.
> it looks like a hardware problem rather than the driver problem.
>
> questions come to my mind are:
>
> - try UP kernel if you're using smp?
> - playing on three cards is ok?
> - still problems only with two cards?
> - how about different pci slots?
>
>
> Takashi
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