[linux-usb-devel] [Fwd: [Linux-usb-users] Fwd: 2.6.17-rc6-mm2 - USB issues]

[linux-usb-devel] [Fwd: [Linux-usb-users] Fwd: 2.6.17-rc6-mm2 - USB issues]

Post by Sergey Vla » Wed, 21 Jun 2006 21:20:10


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On Tue, Jun 20, 2006 at 09:21:35PM +1000, Johny wrote:
[...]

Well, not exactly this line (0000:00:11.1 is the IDE controller, which is
in legacy mode and therefore does not use its PCI interrupt), but the next
similar line is for the USB 2.0 (EHCI) controller:

-PCI: Via IRQ fixup for 0000:00:10.3, from 5 to 10


Try as root:

setpci -s 00:10.3 INTERRUPT_LINE=0a

(this matches "ehci_hcd 0000:00:10.3: irq 10, ..." in dmesg).

If after doing this USB works again (you will need to replug USB devices),
the missing VIA IRQ quirk is definitely the problem.


You seem to have also the builtin audio and Ethernet on this board - these
devices may have the same problem, if you tried to use them.


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[linux-usb-devel] [Fwd: [Linux-usb-users] Fwd: 2.6.17-rc6-mm2 - USB issues]

Post by Sergey Vla » Wed, 21 Jun 2006 23:10:07


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Yes, acpi=noirq will work around this bug in many cases, because Linux
will not try to reassign IRQs set up by BIOS.

BTW, the problem may be considered as an ACPI BIOS bug, because
reconfiguring a PCI Interrupt Link should set up IRQ routing, but it
obviously does not. Unfortunately, this problem seems to be widespread,
so a workaround in kernel is needed.

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