http://bugzilla.kernel.org/show_bug.cgi?id=12391
------- Comment #11 from imr...@gmail.com 2009-01-13 21:21 -------
(In reply to comment #7)
> Hi, Gergely
> Will you please double check whether the usb.autosuspend is enabled on the
> 2.6.27.10 kernel?
> Will you please also attach the output of acpidump?
> Thanks.
>
On system start usb.autosuspend is not enabled in either 2.6.27.10 or 2.6.28.
One strange thig is, though, checking /proc/acpi/processor/*/power, that on
system start in case of 2.6.27.10 it reports the CPU to be in C2 ~100% while
powertop says C3. In case of 2.6.28, both of them say the CPU is in C2.
So to me it seems, based on /proc/acpi/processor/*/power, both kernels should
behave similarly, that is not going to C3 unless there's usb.autosuspend
enabled.
I tried powertop 1.10 and 1.11 (svn), both had the same behaviour (as in
differing from /proc).
Actually: /proc/acpi/processor/*/power does not seem to contain too much
information (well, at least not for me), do I have to turn on some other kernel
parameters to get more useful statistics? Or this was what you were looking
for?
Cheers,
Greg
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