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[MaxNegro <negro@xxxxxxxxxx>]

I did a couple of tests on my setup. First of all, problem seems to
disappear if i use the radeon driver instead of fglrx one. Then i ssh-ed
in from another machine. This is the output of powertop with screen
blank (only first few lines copied, compiz using 100% of a core):

            993,3 ms/s       0,0        Process        compiz
            100,0%                      Device         Codec audio hwC0D1: LSI
            100,0%                      Device         Codec audio hwC0D0: IDT
              0,9 ms/s      81,6        Timer          tick_sched_timer
              4,9 ms/s      15,7        Process        /usr/lib/indicator-application/indicator-application-service
            108,0 µs/s      11,8        Timer          hrtimer_wakeup

This the same, with screen active:

            100,0%                      Device         Codec audio hwC0D1: LSI
            100,0%                      Device         Codec audio hwC0D0: IDT
              3,5 ms/s     114,9        Timer          tick_sched_timer
             69,7 ms/s      27,5        Process        compiz
              1,6 ms/s      44,2        Interrupt      [58] fglrx[0]@PCI:1:0:0
              0,9 ms/s      37,3        Interrupt      [6] tasklet(softirq)
             34,8 ms/s      19,6        Process        /usr/lib/unity/unity-panel-service
              9,4 ms/s      20,6        Process        /usr/lib/indicator-application/indicator-application-service
              9,0 ms/s      20,6        Process        //bin/dbus-daemon --fork --print-pid 5 --print-address 7 --session
            620,4 µs/s      16,7        Timer          hrtimer_wakeup

fglrx interrupts are absent in the first lot. Is this expected?

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https://bugs.launchpad.net/bugs/961202

Title:
  A locked screen (blank screensaver) has compiz generating ca. 40
  wakeups/second

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