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

Julian Edwards julian.edwards at canonical.com
Mon Jan 5 14:16:47 UTC 2009

On Monday 05 January 2009 14:04:04 Martin Gräßlin wrote:
> The problem of too many wakeups is solved in KDE 4.2 being released this
> month. KWin will be idle and don't wake up if nothing has to be painted.
> I just did the test and KWin is at about 8 wakeups per second when being
> idle.

Awesome!  Thanks Martin.

> Nevertheless my nvidia binary blob is still responsible for 60 wakeups
> per second when compositing is enabled. I have no idea if this can be
> improved (I guess no) and I don't know if this is the same for other
> drivers.

There's a config option for Xorg/Nvidia:
	Option          "OnDemandVBlankInterrupts"      "True"

that will fix that for you.

Other drivers don't have this problem (well at least my intel doesn't).

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