This is the last info I can provide. I looked through some other bug
reports, and I decided to see what some combinations of boot options
could do:
* acpi_skip_timer_override: I didn't see any change.
* enable_8254_timer: I didn't see any change.
* disable_8254_timer: Kernel panic - not syncing: Attempted to kill init!
* noapic: The system was able to boot, and I didn't see the bug message. I
did, however, see "spurious 8259A interrupt: IRQ7." when I looked through the
dmesg output.
* noapic nolapic: I saw all of the messages/changes that I saw when just
'noapic' was set.
* acpi=off: I didn't see any of the ACPI information at boot, and the CPU
frequency scaling module didn't load ("powernow-k8: MP systems not supported by
PSB BIOS structure"). I didn't see any indication of the HPETs being used
("time.c: Using PIT/TSC based timekeeping."), but I did see the line "testing
NMI watchdog ... OK.".
* acpi=off noapic: I saw all of the messages/changes that I saw when just
'acpi=off' and 'noapic' were set. There were also some PCI errors ("PCI: IRQ 0
for device 0000:83:00.0 doesn't match PIRQ mask - try pci=usepirqmask" and
"PCI: No IRQ known for interrupt pin A of device 0000:83:00.0. Please try using
pci=biosirq.").
* acpi=off noapic nolapic: I saw all of the messages/changes that I saw when
just 'acpi=off' was set, and when 'acpi=off' and 'noapic' were set.
--
"8254 timer not connected to IO-APIC" after BIOS upgrade on Sun X4200 M2
https://bugs.launchpad.net/bugs/257157
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