cx_lowest and CPU usage

Andriy Gapon avg at
Fri Feb 22 16:05:04 UTC 2008

on 20/02/2008 20:33 Andriy Gapon said the following:
> on 19/02/2008 23:42 Andriy Gapon said the following:
>> The last result most probably means that RTC IRQ was not the interrupt
>> to wake CPU from sleeping state.
>> The first possibility that comes to mind is that on this particular
>> hardware RTC interrupt (IRQ8) is not able to wake the system from C2 state.
> So it seems that this was true.
> Here's a shortcut to the relevant info:
> PIIX4E (FW82371EB) specification
> DEVACTB — DEVICE ACTIVITY B (FUNCTION 3) pci register description
> BRLD_EN_IRQ8, bit 5
> $ pciconf -r pci0:0:7:3 0x58
> 03040c07

Attached is a patch that fixes the issue for me (without any
side-effects) and should not cause any harm for others.

Andriy Gapon
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