I have Arch running on an HP Pavillion g4-1200tx laptop with these specs:
2.2 GHz Intel Core i3-2330M 3 MB L3 cache 4 GB 1333 MHz DDR3 Memory AMD Radeon HD 6470M (1 GB DDR3 dedicated)
A vanilla install of Arch eats up the battery at around 28 watts.
After doing some power tweaks, mainly
Installing and configuring tlp
Activating the i915_enable_rc6
Disabling the discrete GPU with vgaswitheroo
and with the wifi/bluetooth radios off and cpu scaled to powersave, it consumes 20 watts and is uncomfortably hot.
I think this is because the PCI devices are at 100% use. But PCI runtime power mgmt. is active through tlp. I've tried laptop mode tools but tlp comparitively gives better results.
Here is the tlp stat output.
What should I do to improve the battery life and make it run cooler?
Last edited by vn14 (2013-05-01 12:52:30)
Are you sure your discrete GPU is really disabled? I don't have a Radeon so I don't know much about that, but I had a similar problem with my GeForce so maybe it comes from there.
I don't think this is because of the PCI devices. Mine are all at 100% use in PowerTOP too.
Last edited by mau5kito (2013-05-13 09:32:08)
Oh! I thought it was so because PCI was at 100%.
The GPU is disabled.
# cat /sys/kernel/debug/vgaswitcheroo/switch 0:DIS: :Off:0000:01:00.0 1:IGD:+:Pwr:0000:00:02.0
Also, it's not a desktop environment's fault (I'm running KDE); Same amount of power is consumed even when X is not running.
Is there a way to find out why the power consumption is so high?
How much power does Arch consume normally?
Last edited by vn14 (2013-05-16 13:14:37)