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SubjectRe: BIOS bug, APIC version if 0 for CPU#0
On Tue, Apr 22, 2008 at 5:21 AM, Jacek Luczak <difrost.kernel@gmail.com> wrote:
> Hi,
>
>
> > Hello;
> > with the latest git on a macbook the system can barely boot without
> > freezing, a work around for me at leat is either disable smp, or once
> > booted turn on glxgears,or compiling the kernel i.g. when using the
> > processors I'm not receiving a freeze, only when everything starts
> > lowering down. in dmesg I'm noticing BIOS bug, APIC version is 0 for
> > CPU#0! fixing up to 0x10. (tell you're hw vendor) could this be the
> > reason for the system freezes?,
>
> I don't think so. On my machine there's no freezes with latest git and:
> ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
> BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor)
> ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
> BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor)
>
> I've got exactly the same messages.

Are you using a macbook aswell?

>
>
> > also I didnt have a camera handy on me
> > but the screen spit out = Bug spinlock lockup on CPU#0
> > swapper/0. c17fa7c0 PID 0, comm: swapper not tainted.
>
> Can you try to write down more of those bug messages?

Yeah,

>
>
> > I dont have a problem disabling smp, except when I cat /proc/cpuinfo I
> > don't see anything about my cores.
>
> What exactly you expect to see in /proc/cpuinfp while smp is disabled?

under smp I see cpu cores. disabling smp I dont see cpu cores, under
cat /proc/cpuinfo.


>
>
> > I know this is a stupid question
> > but will it hurt the system if smp is disabled
> > for the macbook pro ati chipset.?
>
> No it won't.
>
> -Jacek
>

Cool as long as the system Is o.k. disabling smp. What about x86: PAT
support is disabled. how do I enable this option?
regards;

--
Justin P. Mattock


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