Comment 18 for bug 348694

Someone suggested out of band that I open a kernel.org bugzilla.

By way of preparation for doing that, I searched the existing bugzilla for "ACPI CPU C3 interrupt" and turned up additional insight:

In BZ 10409
http://bugzilla.kernel.org/show_bug.cgi?id=10409

it was suggested leaving HPET enabled, and applying boot option 'acpi_skip_timer_override'

Running powertop with this option set, I am told the CPU is in C3 state 95.3% of the time, and that the wakeups are:

23% hpet3
18% hrtimer_start (tick_sched_timer)

I suspect that to those who understand how HPET ACPI interrupts work, this is probably the key insight into understanding what to do next.

Any suggestions for a next step for me to take?