On Wed, May 20, 2015 at 08:56:57PM -0600, Shaun Reiger wrote:
> Hello I'm trying to find out if the power consumption relating to the
> intel_powerclamp driver ("Package Level C-state Idle Injection for
> Intel CPUs") was ever fixed. I'm current running 5.7 stable and I find
> my cpu is still consuming 6W of power in any state. It was mentioned
> in the emails from last year that a Linux driver fixed this issue. Any
> updates on this issue would be great.
I had running OpenBSD in my Thinkpad T410 for some months suffering this
issue.
In the while I made tests with a Linux liveCD with 3.8 kernel. With
intensive CPU usage, i.e. running mplayer without interruption, the
battery life (9 cell) was the same in both OSs, exactly two hours. But
with light CPU usage (i.e. editing files with vi) OpenBSD still died
after two hours but with Linux I got around three and a half.
The 3.8 kernel hadn't the intel_powerclamp module.
Unfortunately I had to reinstall Linux. Now running 3.10.17 with
intel_powerclamp module I get an average of three and a half hours of
battery life. So it seems that it isn't the intel_powerclamp module
what make the difference, at least in T410 model.
Walter
--
PLEASE, LET'S PRESERVE GOOD EMAIL PRACTICES
- Use plain text (no HTML please).
- Separate paragraphs with empty lines.
- Use hard wrapped lines at no more than 72 columns.
- Avoid top-posting.
- You'll find the above easy to accomplish by using a decent email
client (i.e. Thunderbird, Claws mail, Mutt).
