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From: "Edward Wildgoose" <ed@wildgooses.com>
To: "Alan Cox" <alan@lxorguk.ukuu.org.uk>, "Greg KH" <greg@kroah.com>
Cc: "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: Interrupt problem, no USB on SMP machine with 2.4.19/20/21
Date: Fri, 7 Mar 2003 23:27:23 -0000	[thread overview]
Message-ID: <052f01c2e501$1c0c4790$0369a8c0@BigMotha> (raw)
In-Reply-To: <1047080149.23803.25.camel@irongate.swansea.linux.org.uk>

> On Fri, 2003-03-07 at 22:13, Greg KH wrote:
> > Have you booted with "noapic" on the command line?  That's the only way
> > a lot of VIA motherboards will get their onboard USB controller to work
> > properly.
>
> VIA onboard devices require the interrupt line and pin are both written in
> APIC mode. Linux for reasons I still don't understand does not do that by
> default. The current -ac tree has a quirk for this although it doesnt seem
> to be working for all cases and needs a victim to review it more carefully

booting my -ac kernel with noapic gets the USB working (hooray and thanks).
I am just recompiling my gentoo-sources kernel to see if I can make that
work (it certainly doesn't without ACPI enabled).

I will play with config files and kernel sources and see if I can determine
whether anything *other* than the -ac branch will work correctly.  Is there
any way that I can usefully help feed that info back to the developers?  Are
there any tests that I can try?

Thanks for your help all


      reply	other threads:[~2003-03-07 23:16 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-03-07 19:42 Ed Wildgoose
2003-03-07 22:13 ` Greg KH
2003-03-07 23:35   ` Alan Cox
2003-03-07 23:27     ` Edward Wildgoose [this message]

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