Comment 12 for bug 1354046

Since using kernel 3.19 (http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.19-vivid/), the problem is gone. Battery consumption down, general responsiveness up. Finally!

DELL E6510, Xubuntu 14.10

Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz
Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (i915)
OpenGL version string: 2.1 Mesa 10.3.2

eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm

linux-image-3.19.0-031900-generic