Re: IRQ (routing ?) problem [was Re: epic100 in current -ac kernels]<

From: Arnd Bergmann (std7652@et.FH-Osnabrueck.DE)
Date: Mon Feb 26 2001 - 09:51:57 EST

I noticed that there have been updates to epic100 again and just wanted
to note that the problem remains:
2.4.2-ac3 still crashes, but it works fine when I use the epic100.c
from 2.4.0-test9, which was the last working version for me.

Arnd <><

On Thu, 15 Feb 2001, ARND BERGMANN wrote:

> Sorry for the delay, I could not get physical access to the machine
> for the last days.
> I was able to do some more testing today and found this:
> - The problem is not the IRQ /sharing/, after getting rid of all the
> other PCI cards, the problem was still there.
> - The only thing that seems to have any effect on the symptoms is the
> presence of the USB driver, either usb-uhci or uhci. I am not using
> USB at all. As described before, the system behaves is either of those
> ways:
> * epic100 driver without DMA mapping (e.g. 2.4.0-ac9): normal operation
> * driver with DMA mapping+USB driver loaded: lots of interrupts -> slow
> * driver with DMA mapping, USB driver not loaded: hang after ~2 seconds
> - I sometimes get 'spurious interrupt: IRQ7', even though no device is
> connected there. Probably not important.
> On Sat, 10 Feb 2001, Francois Romieu wrote:
> >
> > The following informations may help:
> > - motherboard type
> Asus A7V, onboard USB hub and Promise ATA/100 chip
> > - bios revision
> Can't see right now, system was bought in October 2000
> I think it was 1.004, but I am not sure.
> > - lspci -x
> see attachment, this was when I ripped out sound, tv and scsi
> > - 2.4.2pre3 + whatever recent ac epic100 = ?
> Still no improvement until latest -ac (2.4.1-ac13)
> Arnd <><

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