[ltp] Excessive power consumption: x220 with Fedora 15

[Christos Papadopoulos]

On 08/25/2011 01:12 PM, Lars Seipel wrote:
> On Thursday, August 11, 2011 11:33:46 AM Christos Papadopoulos wrote:
>> Powertop reports 16-17W with machine idle. Unit is X220-4286, Intel
>> graphics and network. Is this normal? Any ideas how to reduce it?
>
> Some option for the i915 kernel module got disabled by default because it
> caused serious regressions for some people. See this upstream kernel commit
>
> http://git.kernel.org/?p=linux/kernel/git/stable/linux-3.0.y.git;a=commitdiff;h=05bd42688dbc066d4e2689b6f73c0470601f788b
>
> Unfortunately this led to an increased power consumption on other devices.
> Luckily, it can be trivially turned on again. See
>
> https://bugzilla.redhat.com/show_bug.cgi?id=727579
>
> Solution works for me on X220...
>
> Lars

Thank you! Powertop now reports under 9W at idle with minimum 
brightness. Much better!

Christos.