* Re: Power regression found on 3.6-rc1+
[not found] <CAKw44fY_f69qGXHbcyXvr4i=or4FpB7TDQVijLkN7tv5iU-zrQ@mail.gmail.com>
@ 2012-10-29 7:49 ` Rafael J. Wysocki
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From: Rafael J. Wysocki @ 2012-10-29 7:49 UTC (permalink / raw)
To: Micael
Cc: linux-kernel, Linux PM list, Linux PCI, Zheng Yan, Bjorn Helgaas,
Huang Ying
On Friday, October 26, 2012 12:37:36 AM Micael wrote:
> I have a laptop running Arch Linux and found that upgrading from 3.5.6
> to 3.6.2 had a huge impact on my battery life. Power consumption went
> from ~10W to ~20W.
> I initially thought it was a i915 driver problem since the CPU temps
> went up and so I opened this bug:
> https://bugzilla.kernel.org/show_bug.cgi?id=49031
>
> However, as you can see if you read the bug's comments, after
> bisecting this I found the culprit to be commit
> 71a83bd727cc31c5fe960c3758cb396267ff710e:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=71a83bd727cc31c5fe960c3758cb396267ff710e
I wonder what the problem may be here.
It looks like the polling change in pci_pme_list_scan() is causing problems
to happen.
Thanks,
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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