[ltp] Sudden high power usage
Mon, 04 Feb 2013 08:10:50 -0700
Something happened to my X220 with F17 recently (kernel update?) and
power usage has gone up significantly.
On battery, I see consumption as high as 25W!
Powertop reports the following top offenders (on AC, not battery):
Power est. Usage Events/s Category Description
5.75 W 46.7% Device Display backlight
5.03 W 2757 pkts/s Device Network
interface: wlan0 (iwlwifi)
3.26 W 0.0 pkts/s Device Network
interface: em1 (e1000e)
wlan0 power fluctuates between 5-7W. I am on a busy wireless, but is
I don't have a wired connection, yet the wired interface uses over 3W,
sometimes as high as 5W!
This seems to happen (or get worse) after a suspend-resume cycle.