Hi Andi & Len,

Sorry for cross posting all over the place, I tried to CC some people who have
been bugged by this bug.

I finally got the IOAPIC working on my eMachines m6805 amd64 laptop with the
following patch. I have not tried it on any other machines, so can you guys
please check the sanity and make the necessary changes if needed?

This fixes at least ACPI bug 2090:

http://bugme.osdl.org/show_bug.cgi?id=2090

Might fix some other x86 VIA bugs too?

To turn it on, apic still needs to be specified in the kernel cmdline:

root=/dev/hda3 ro psmouse.proto=imps apic console=tty0

Now cat /proc/interrupts shows:

 0:      70843    IO-APIC-edge  timer
 1:          9    IO-APIC-edge  i8042
 2:          0          XT-PIC  cascade
 8:          0    IO-APIC-edge  rtc
10:          0   IO-APIC-level  acpi
12:         44    IO-APIC-edge  i8042
14:       2734    IO-APIC-edge  ide0
15:         19    IO-APIC-edge  ide1
17:          0   IO-APIC-level  yenta
18:          0   IO-APIC-level  eth0
21:        565   IO-APIC-level  ehci_hcd, uhci_hcd, uhci_hcd, uhci_hcd
22:          0   IO-APIC-level  VIA8233
23:          6   IO-APIC-level  eth1
NMI:         12 
LOC:      70752 
ERR:          0
MIS:          0

And things are just working :)

Regards,

Tony

And here's the patch, it's against 2.6.5-rc2: