Re: Re: 2.6.0-pre4 hangs if acpi enabled

["Éric Brunet" <Eric.Brunet-l5PIGlIYzrxGWvitb5QawA@public.gmane.org>]

On Mon, Aug 25, 2003 at 02:18:33PM +0200, Felipe Alfaro Solana wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=1123
> 
> During boot, the kernel checks for i8042 AUX/MUX ports, tries
> registering IRQ #12 and then hangs. I fixed the problem on my i845DE
> motherboard by flashing a new BIOS with APIC and IOAPIC support. Then, I
> recompiled 2.6.0-test4 with APIC and IOAPIC support and the hangs went
> away.

Indeed, compiling in APIC and IO-APIC hides the problem and lets the
computer boot and work.

By the way, why should people use APIC and IO-APIC on UP computers ? Is
it faster or more efficient in some way ? Kernel documentation says that
the APIC is a ``replacement for PC-style interrupt controller''. Is there
anything the APIC can do that the traditionnal interupt controller can't
do ? Kernel documentation is not very incentive for wasting an extra 7.5
ko in the kernel image...
> 
> you have the time, please, attach your "dmidecode" and "acpidmp" to the
> bug report at the above URL.
> 
I don't have any dmi and the output of acpidmp is now on the web page
given in my bug report.

Éric


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