Re: broadcom 5752 in HP dc7600U works on 2.6.13 but does notworking on 2.6.16

[Andrew Morton]

On Thu, 01 Jun 2006 10:54:56 +0100
Barry Scott <barry.scott@xxxxxxxxxxxx> wrote:

> > It appears that the 2.6.13 kernel did not bring up the machine's io-APICs,
> > but 2.6.16 did.  However you are receiving eth0 interrupts on 2.6.16 so
> > perhaps that's not relevant.
> >
> > Don't know, sorry - tg3 works OK for most people.  You could try booting
> > with the `noapic' kernel paremeter, perhaps.
> >
> > Note that googling for "noapic" gets 212,000 hits - we've _really_ screwed
> > something up in there.  Maybe one day some developer will lay hands on one
> > of these machines and will fix something.
> >
> > If noapic doesn't work (and I suspect it won't) then a next step would be
> > to compile a kernel.org kernel and start enabling debug options.  It's
> > hard, when we don't know which kernel subsystem broke.
> >   
> I'm willing to help get this fixed. I'm happy working inside kernels and 
> drivers
> but will need some guidance to know where to focus to track this down.

ACPI, most likely.

> The obvious problem is solve is why are no interrupts being received by
> the tg3.c code.
> 
> Which kernel should I use to debug this? 2.6.17 latest RC?
> Which debug options do you suggest I turn on to get closer to the problem?
> What information should I collect?

A git-bisect search would be a suitable way of finding out where it broke.

But then, we don't know if this machine has _ever_ worked with IO-APIC's
enabled, do we?

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