Comment 20 for bug 760131

According to phoronix benchmarks (which appears to be down right now), its a regression starting in 2.6.34.
The results or at least a quick summary is posted in the bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/524281/comments/189

Since the other bug report exists for more than a year now, and neither wakeups nor power consumption have been reduced in kernels newer than 2.6.34, i think this bug is a duplicate of #524281