> From: Marek Michalkiewicz [mailto:marekm@amelek.gda.pl]
> long time ago I noticed a problem with the ACPI IRQ not working
> if it is _not_ shared with some other PCI IRQ. The problem still
> exists in the 2.4.21 kernel, confirmed on two machines with the
> MSI MS-6368L motherboard (VIA PLE133 chipset).
>
> I need ACPI for just one thing: to run "shutdown -h now" after the
> power button is pressed. (The box is a server which usually has
> no keyboard connected.)
>
> As I can see in /proc/interrupts, the BIOS usually allocates IRQ9
> for ACPI (not shared with anything else), and the IRQ9 counter is
> always zero. Pressing the power button has no effect at all.
>
> There is an easy workaround: in BIOS setup, set IRQ9 to "Legacy ISA"
> instead of "PCI/ISA PnP" so that ACPI gets some other IRQ, shared
> with some other PCI devices (in my case, IRQ11 is shared by: acpi,
> usb-uhci, usb-uhci, eth0). Then the power button works fine.
>
> Is this a known problem? Should I complain to MSI (BIOS fix),
> or is this a Linux bug? Any patches I should try? This looks
> a bit unusual to me - one would expect problems if an IRQ _is_
> shared, and some broken hardware/driver doesn't like sharing...
>
> If there is no known fix, perhaps the "Legacy ISA" workaround
> (which I discovered by accident) should be documented somewhere?
Is this an SMP machine?
What do the INT_SRC_OVR lines in the dmesg say?
Thanks -- Andy
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This archive was generated by hypermail 2b29 : Mon Jun 23 2003 - 22:00:42 EST