RE: Kernel 2.6.12 + IO-APIC + uhci_hcd = Trouble

[Protasevich, Natalie]

> -----Original Message-----
> From: linux-kernel-owner@xxxxxxxxxxxxxxx 
> [mailto:linux-kernel-owner@xxxxxxxxxxxxxxx] On Behalf Of 
> Michel Bouissou
> Sent: Sunday, July 10, 2005 2:11 AM
> To: linux-kernel@xxxxxxxxxxxxxxx
> Cc: stern@xxxxxxxxxxxxxxxxxxx; mingo@xxxxxxxxxx
> Subject: Kernel 2.6.12 + IO-APIC + uhci_hcd = Trouble
> 
> Hi there,
> 
> I use a Gigabyte GA7-VAXP motherboard that has been fine for 
> more than 2 years with 2.4 series kernels, and that gives 
> trouble with 2.6.12 (and previous) kernels.
> 
> The problem seems to sit between the UP IO-APIC and USB 
> uhci_hcd driver.
> 
> The GA7-VAXP MB is equipped with an Athlon 2000+ XP and a VIA 
> KT400 chipset.
> 
> Using 2.4 series kernel the IO-APIC is used just fine.  Was 
> never source of any kind of problem.
> 
> Using 2.6.12 kernel, if the IO-APIC is enabled in the kernel 
> configuration, then the interrupt controlling the uhci_hcd 
> USB controller gets disabled as soon as uhci_hcd is initialized.

Michel,
Symptoms that you describe resemble several IRQ problems with VIA
chipset reported by others (but not quite...) Could you check on
bugzilla #4843 please
http://bugzilla.kernel.org/show_bug.cgi?id=4843 and see if the patch
fixes your problem.
Thanks,
--Natalie
 
 
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