Re: power regressions
Hi,
as remarked by phoronix.com, new kernel versions are introducing
outstanding
power consumption regressions. they point out some advices too
http://www.phoronix.com/scan.php?page=article&item=intel_i915_power&a...
what's the take of fedora on this?
will it be upstream or distro specific?
AFAIK we currently have i915_enable_fbc in f16 and rawhide, the
others 2 are good candidates for tuned laptop-*-powersave profiles.
We are doing own benchmarking and probably add them.
I've read the good fedora "Power Management Guide", it
deserves more
prominent place into fedora docs website.
There is also the f15 draft, which still haven't gone through docs
guys (but we are pushing on them):
http://jskarvad.fedorapeople.org/doc/power-management-guide/Fedora_Draft_...
The f16 draft is being prepared.
but, I have a question:
"Additionally (or alternatively) you can perform many small
adjustments to
various system settings:"
"enable laptop mode (part of the laptop-battery-powersave profile)"
so, I've installed tuned, set laptop-battery-powersave profile, and I
have
to additionally pass these commands? or are they are already active,
as I
expect?
All that are marked by 'part of the laptop-battery-powersave profile'
gets activated automatically when you switch to laptop-battery-powersave
profile. Others that are marked 'default in Fedora' are activated even
without tuned.
hope some more upstream work on power consumption reduction will be
placed
in line for each release,
specially in this era of ultramobility, ultrascalability, and
environmental
emergency.
my eeepc with winxp was reaching 10 hours and half of autonomy and
some 7
with lucid. now we are at 4 and an half..
Really sad, but the kernel is still improving. Feel free to attend
our f16 power management test day that will be held 2011-09-29
(live CD will be provided) to make f16 better. Also you can check our
PM blog that we started recently:
http://pm-blog.yarda.eu/
There is not too much content yet, but we are doing our best :)
regards
Jaroslav