According to powertop, icedove-bin wakes up the CPU 7-8 times per
second. This is when it is sitting unused on an inactive workspace with
2 open IMAP connections.

Top causes for wakeups:
  36.5% (  7.6)       icedove-bin : futex_wait_queue_me (hrtimer_wakeup)

There is no reason for icedove to need to wake up that often, please
make it more power-friendly.

forwarded 616680 https://bugzilla.mozilla.org/show_bug.cgi?id=407325
thanks

Hello,

This is an old problem. The Mozilla Bugtracker show entrys from the end
of 2007 for Firefox.
 ->    https://bugzilla.mozilla.org/show_bug.cgi?id=407325
And in the between times this problem should be no real problem anymore.

Here on version 3.1.6 Squeeze/amd64 the wakeups significant lower.
   2,2% ( 11,7)       icedove-bin : hrtimer_start_range_ns (hrtimer_wakeup)

Is the power consumption still heavy?
If so can you post your actual tests on the posted BugtrackerID in
Mozilla, because this is a upstream related problem?

Thanks!
Carsten Schoenert