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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packagers, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/961202
Title:
A locked screen (blank screensaver) has compiz generating ca. 40
wakeups/second
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