Lenovo_Yoga_2_Pro_2

Keep your Yoga 2 Pro battery zen with Ubuntu

By on 5 April 2014, in Blog

I ran a PowerTop session on my new Lenovo Yoga 2 Pro, to acheive better battery life. It’s already descent, but getting N minutes more is still cool. On the road to get 7 hours :-D

Additions

These were suggested by PowerTop and are working perfectly:

echo '1500' > '/proc/sys/vm/dirty_writeback_centisecs';
echo '0' > '/proc/sys/kernel/nmi_watchdog';
echo 'min_power' > '/sys/class/scsi_host/host0/link_power_management_policy';
echo 'min_power' > '/sys/class/scsi_host/host1/link_power_management_policy';

Untouched

The ELAN touchscreen: setting its auto-management for power consumption makes it totally unusable after its suspension. There is no way to wake it back up. Obviously, for a touchscreen this is very bad, even more when the machine is in tablet/tent position…

Removals

The wifi always goes mad after a moment on this machine. It asks for an already known password on an already known network. The signal drops, or the card completely looses the connection. I’ll try setting the wifi full power to see if that enhances this particular behaviour.

iw dev wlan0 set power_save off