IRQ conflict

From: Mark Henning (mahenning_at_btopenworld.com)
Date: 08/10/04 

Date: Tue, 10 Aug 2004 09:58:26 +0100

Hello,

I am having trouble resolving what I beleive is an IRQ conflict between my
USB controller and network interface.

Originally, the network interface and ehci were sharing IRQ 11. booting the
kerenl with acpi_irq_balance moved ehci to another IRQ and networking worked
fine.

However, upon recompiling the kernel with ohci support, two new devices
'ohci' have been added and again the IRQs are being shared. USB and
networking no longer work, and acpi_irq_balance does not seem to help.

The bios has no option to change the IRQ for either the network interface or
USB controller and since both are onboard, physically moving them is not an
option.

I have been googling for any documentation on how linux and acpi handle
interrupts, and kernel parameters I can use to try and resolve the conflict,
but have found nothing.

I cannot post my /proc/interrupts or any of the errors I am recieving just
yet, but I will post them this evening.

Thanks,

Mark.

Relevant Pages

  • Re: Network Not Working - multipart post (Debian Sarge (Stable))
    ... 0000:00:00.0 Host bridge: Intel Corp. 82815 815 Chipset Host Bridge and Memory Controller Hub ... Using ACPI for IRQ routing ... Disabling IRQ #3 ...
    (Debian-User)
  • Re: Poor Samba throughput on 6.0 RC1
    ... Maybe a longshot, but what is your cluster size? ... I'd be interested to hear if same irq is being shared if that is enough bw? ... >> This machine should be able to max out the network interface. ...
    (freebsd-current)
  • Re: problem with network - help needed
    ... second i deselected APIC in my kernel despite ... bios see Network Interface on IRQ 10 and Display Device also on IRQ 10 ...
    (comp.os.linux.networking)
  • Fw: LOR:vfs_bio.c and ufs_dirhash.c
    ... Jun 15 17:42:22 ibb kernel: ... bridge> irq 16 at device 1.0 on pci0 ... 0x80000000-0x8fffffff,0x98400000-0x9840ffff irq 16 at device ... USB controller> port 0x80c0-0x80df irq 16 at device 26.0 ...
    (freebsd-current)
  • Re: computer freezes USB2 driver problem?
    ... Can I redirect the USB controller to another IRQ? ... of Device Manager will help. ...
    (microsoft.public.windowsxp.general)