Relative noob trying to resolve IRQ issues..

pinnocchio · 11-29-2004, 06:58 PM

Hi Guys

I'm a relative noob to Linux but have extensive experience of PC hardware and Windows based systems.

I'm trying to resolve what would normally be a plug and play IRQ conflict issue:-

I have a VIA M10000 mobo that I've installed FC2 on and am trying to install a card in the PCI slot (mobo only has one). The problem is that the card is trying to share IRQ 10 with the onboard USB system and thereby causing a conflict. The VIA BIOS is pretty limited with regard to the manual settings you can have for PCI so I've disabled Serial, LPT and all other items I don't need (I do need USB for other things) in the hope that the card would re-allocate the IRQ to a spare without success. The card loads it's module successfully and reports itself if I use cat /proc/interrupts as being on IRQ 10, however if I use lspci or scanpci it is not on the reported list and indeed the application for the card says it's not there even though the OS reports the module loaded correctly.

I've read the docs at Linux.org (linux.org/docs/ldp/howto...-7.html#sys_dir) and reading between the lines I should be able to manually set the IRQ the card uses I think?

So for the experts can you point me in the right direction so that I can get the OS to set the IRQ for the card and how do I do that (either settings in the card module or via a setting in the OS itself). I'm pretty stumped at the moment and because of my relative noobness don't want to go hacking around too much in case I break something else without realising it .

TIA

P

Peacedog · 11-30-2004, 07:44 AM

Hi pinnocchio, welcome to lq. What kind of card is it? Have you turned off the "pnp os" option in the bios? You should be able to pass some parameters using the /etc/modules.conf, or /etc/modprobe.conf files.
good luck.

pinnocchio · 12-01-2004, 03:05 PM

Hi

It's a OEM Clone Digium X101P card.

The box is going to be an Asterisk VoIP server.

I've tried with both PnP BIOs on and off to no effect.

Is there a HowTo anywhere on modifying /modules.conf or modprobes/conf?

TIA

P

Peacedog · 12-01-2004, 05:45 PM

Not that I'm aware of, you might try something like this.

alias device module
options device -o module io=0x000 irq=0

Those are random numbers, your io and irq will be different. You may also want to have a look at the asterisk support.

http://www.asterisk.org/index.php?menu=support

good luck.