On 8 November 2010 17:13, Rex Dieter <rdieter(a)math.unl.edu> wrote:
On 11/08/2010 03:02 AM, Chris Rouch wrote:
> Over the weekend yum pulled in the newest version of kde for f13
> (4.5.2 I think). Since I rebooted and logged in my laptop seems to
> have the fan going most of the time. Gkrellm shows both CPUs are doing
> something, and top confirms that kwin and plasma desktop are each
> using between 10% and 30% CPU. For comparison on my f12 desktop at
> work they use between 2 and 5% cpu. I don't know what the used before
> the upgrade, but I do know the fan was usually off except when the
> machine was loaded.
>
> This happens with only one window (firefox), and that only having a
> couple of tabs open.
>
> Is this something I can change? If so, where do I need to look?
Depends on a lot of things.
What video driver is in use?
Latest nvidia, from rpmfusion
What arch?
x86_64
Is flash installed, and any applets running in any of those flash tabs
you mention?
Yes it is installed, but none of the tabs are visibly using it (I
had/have gmail and a bbc news page open - the latter is static).
Are destkop effects enabled? Which effects? (blur in particular, is
known to cause degraded performance/load with many driver combinations).
Desktop effects are enabled. I had blur enabled and I've just disabled
it. No immediate effect - the fan is still spinning, though the cpu
percentages are now down to 10-15%.
Switching off all desktop effects makes a big difference. kwin is no
longer in top's list of cpu hogs, and plasma desktop sits around 1%
until I actually do something, when it goes to around 15%.
Thanks for your help.
Regards,
Chris