[Bug 283100] Re: powertop shows kwin generating lots of wakeups (intrepid, kde4)

Julian Edwards launchpad at julian-edwards.com
Wed Oct 15 21:20:21 UTC 2008

Ok so I turned on "show paint" and "show fps"

First observation: If I change the screen's refresh rate, I see the
corresponding change in both the fps shown by kwin *and* the

Second observation: If I don't touch the mouse and have a static screen,
nothing is apparently getting repainted as you say, yet the fps and
wakeups are still running at the same rate (50/60 whatever I set with

Conclusion: kwin is waking up unnecessarily with vblank interrupts.

Now I don't mind this being marked as "Won't fix", but marking it as
"invalid" is wrong based on these observations.

Anyway, thanks for listening, I'll just have to turn off the effects
when on battery and look forward to 9.04.  Thanks!

powertop shows kwin generating lots of wakeups (intrepid, kde4)
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