Moved from thread: 'Battery Life on Thinkpad x220'
I've just installed waldorf on a HP Elitebook 2560p.
Power is around 17.5w.
Using these parameters from el_koraco, and phoronix, etc.,
You have two choices. First, you can run the Liquorix kernel. Second, you can run the Debian kernel, but you have to edit /etc/default/grub and change GRUB_CMDLINE_LINUX_DEFAULT="quiet" to
GRUB_CMDLINE_LINUX_DEFAULT="quiet pcie_aspm=force i915.i915_enable_rc6=1 i915.i915.lvds_downclock=1 i915.i915_enable_fbc=1"
Then you run sudo update-grub and reboot.
Last edited by dura (2012-11-12 00:35:31)
I just added the parameter, and watts went from 17.8 to 11- 12w.
I will now try with semaphores as well, because it was that which seemed to make the big difference to my x121e.
GRUB_CMDLINE_LINUX_DEFAULT="pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 i915.semaphores=1"
These parameters seem to make little difference, Elitebook is still around 11-12w.
Now hardran's script.
Last edited by dura (2012-11-12 00:36:47)
After hardran's script, power is now down to 9.69w.
Might have a look at tlp next.
For some reason powertop wont let me see baseline power, only actually consumption.
Last edited by dura (2012-11-11 16:37:43)
TLP is now on. More savings noticed.
Now applying powertop sticky settings and it is going down more:
8.2w and counting....
Going to continue fiddling, going by this guide:
The devil at work: baseline apparently 666mw, idles around 7-8w, and go all the way up to 25w briefly under load.
Last edited by dura (2012-11-12 00:33:28)