Re: APIC on Dell Laptops - WAS: Re: [RFC] Fix NMI watchdog

Disconnect writes:
 > Local APIC disabled by BIOS -- reenabling.
 > Found and enabled local APIC!
 > 
 > And now /proc/cpuinfo and cpuid both show APIC support.
 > 
 > Removed/replaced power, triggered lid-switch/battery-status/etc with no
 > issues.  (The only thing that caused trouble was Fn-F10, the "eject cd"
 > button.  Never tried it under Linux before, and the cd isn't in it at
 > the moment anyway, so I'm betting thats unrelated. But it did cause a
 > lockup that even sysrq couldn't recover.)

Nice.

 > Not 100% clear on what the APIC does, but I'm not sure its doing it ;) 
 > 
 > PCI: Using ACPI for IRQ routing <-- shouldn't this be missing if the
 > APIC is in use?

Nope. local APIC != I/O APIC. Disable ACPI, or enable IO_APIC (and hope it's there).

 > (Full dmesg attached, for those who are curious - the unknown-scancode
 > is for the various laptop buttons - bright/dim, vol, media, battery,
 > etc.  Except for the volume buttons the only ones that work are the ones
 > that directly hit the hardware, ala bright/dim.)
 > 
 > Also, for others with an I8500 who might read the dmesg log, don't get

dmidecode data would be nice, for the whitelist rules.