This isn't a Linux specific problem, but Linux did help me to pinpoint
it...
You all may recall a month or so ago I called for help because I seemed to
have suffered an IRQ line failure on a Pentium 133 system.
In the end, I simply picked a different IRQ and away I went.
I had received one cryptic suggestion from someone in Europe that PCI
video cards often used IRQ 11 (the IRQ in question in my case), but that
he didn't know why/how they used it and couldn't explain further.
I just tried to add another PCI card, this time an ethernet card, to the
system. I got the same symptom: the IRQ of the SCSI board didn't work
anymore, and the SCSI initialization of the board when Linux booted was
unable to actually scan the bus.
I took the new PCI ethernet card out and rebooted, and the system worked
fine again. So, I did "cat /proc/pci" for the first time in my life, and
lo and behold, the damned PCI video board is using IRQ 11.......
The BIOS in the system is very simple, and has not PCI slot <-> IRQ
assignment functionality at all. The video card has no jumpers or setup
program to select its IRQ.
How do I determine what IRQ a PCI card/slot will end up with, and better
yet, how do I control it? So, how do I get this new PCI ethernet card to
not conflict with the already used ISA IRQs?
Thanks!
Jay Vassos-Libove [EMAIL PROTECTED]
+1 404 876 8190 home +1 404 705 2867 work
Atlanta, GA 30308 U.S.A.
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