linuxaudio.org

Rick Taylor wrote:
>On Thu, 09 Oct 2003 07:49:02 -0500

quoted text
>"wes schreiner"  wrote:

>

>

>>Robert Jonsson wrote:

>>

>>

>>>Thursday 09 October 2003 12.26 skrev wes schreiner:

>>>

>>>

>>>

>>>>jordan muscott wrote:

>>>>

>>>>

>>>>

>>>>>Ok to be honest I'm not gonna switch distros...... but are you saying

>>>>>that Redhat offers you extra software that allows you to change the

>>>>>IRQs that your pci cards are on?

>>>>>

>>>>>

>>>>There is no such software on any distro. Your motherboard's BIOS decides

>>>>

>>>>

>

>http://www.ibiblio.org/mdw/HOWTO/Serial-HOWTO-8.html#ss8.1

>

>

OK, I forgot about lspnp/setpnp and lspci/setpci. I use lspnp/setpnp on

my IBM Thinkpad 600E to turn the external serial port on and off, among

other things. lspnp/setpnp require a kernel with PNP support compiled

in. Kernel 2.4 mainline doesn't have this yet, but it is in the -ac

patches and also in the kernel that some distros have (Redhat has it I

think, but Debian doesn't). 2.6 has PNP support.
The support for using lspci/setpci is in all 2.4.x kernels I think, but

it doesn't always do what you want. I have a Zoran 36057 video capture

device sitting on IRQ 10, same as my sound card. IRQ 9 is unused (no

ACPI), so I just tried "setpci -v -s 03:09.0 INTERRUPT_LINE=09" to

change its IRQ. lspci -v still says it is at IRQ 10, but lspci -b -v

says it is at IRQ 9. Which is it? OK, I modprobe zr36067 and the module

loads, and now both lspci -v and lspci -v -b agree that the Zoran chip

is at IRQ 10, so nothing changed. *Sigh* I suppose setpci will work in

some cases, with some cards, but it sure isn't a panacea.
wes