Test scenario:

Clean install with developer mode so I can access the device via adb
shell.   Device is on the lock screen, sitting idle, so essentially is
should be doing not a lot.

I ran eventstat to see which processes are generating the most wakeups:

root@ubuntu-phablet:~# eventstat 60 1
 Event/s PID   Task            Init Function             Callback
   87.00     0 [swapper/0]     hrtimer_start_range_ns    tick_sched_timer
   39.05  3759 scopes_ng::Scop hrtimer_start_range_ns    hrtimer_wakeup
   16.68     5 [kworker/u:0]   hwmsen_work_func          hwmsen_poll
   10.00  3951 ubuntu-location hrtimer_start_range_ns    hrtimer_wakeup

Then I strace'd PID 3759, 
strace -p 3759 -e connect

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https://bugs.launchpad.net/bugs/1364464

Title:
  unity8-dash has a thread that is polling rather rapidly on epoll wait

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