On Sunday 17 August 2003 17:38, Jason Stubbs wrote:
> On Sunday 17 August 2003 17:18, Dhruba Bandopadhyay wrote:
> > Dhruba Bandopadhyay wrote:
> > > To add more information it seems that on a fresh config ACPI is
> > > accessible because SMP is on by default but as soon as you turn SMP off
> > > ACPI section is locked and you can't get into it anymore.  This is very
> > > bad for my single processor laptop.  :-(
> >
> > More information:
> >
> > This is now filed as bug [1].  Basically, the problem is that ACPI is
> > dependent upon Local APIC being turned on.  To me, this seems like a bad
> > idea as my machine has no local APIC but requires ACPI.
>
> Damn, you're right. My machine has a local APIC, but when using it my
> PCMCIA modem drops down to 1kb/s which really sux.
>
> I checked into the kernel config files and found on line 33 of
> drivers/acpi/Kconfig:
>
> depends on IA64 || (X86 && ACPI_HT)
>
> I changed that to:
>
> depends on IA64 || X86
>
> That's allowed me to remove the APIC stuff as well as ACPI Processor
> Enumeration for HT - that I'm happy about to seeing I have an AMD!
> Recompiling now and will let you know how it goes once I've rebooted.
>
Recompiled, rebooted and running fine. I'm about to add a comment to your bug 
report as soon as my password arrives. I can't imagine ACPI being bad on 
machines without HT or APIC since it's been in the 2.5 series for a long time 
and even backported to the 2.4 series. I'd say it's just a small bug by 
whomever did the bk3 patches. The HT ACPI bit wasn't in the previous one - 
seems like that was integrated incorrectly.

Jason


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