Mailinglist Archive: opensuse (1761 mails)

[Vadym Krevs <vkrevs@xxxxxxxxxx>]

  On 23/08/10 17:05, Rodney Baker wrote:
> On Mon, 23 Aug 2010 19:26:56 C wrote:
> > On Mon, Aug 23, 2010 at 11:27, Bob Williams wrote:
> > > I have a process running as root which is taking 25 - 30% of my processor
> > > activity. Htop tells me it's
> > >
> > > /usr/bin/Xorg -br :0 vt7 -nolisten tcp - \
> > > auth/var/lib/xdm/authdir/authfiles/A:0-j1o7xa
> > >
> > > It's obviously something to do with the graphic display, but it would
> > > seem to me to be using too much of the main CPU.
> > >
> > > I have a quad core, 2.8GHz processor with 8Gb Ram, and no particularly
> > > graphics intensive software running (Kontact, Firefox, Amarok, gkrellm,
> > > Krusader). The graphics card is nVidia GeForce 9600GT.
> > >
> > > I'm running openSUSE 11.3 and KDE 4.5.
> > Sounds familiar...
> >
> > > Registered Linux User #463880           FSFE Member #1300
> > > GPG-FP: A6C1 457C 6DBA B13E 5524 F703 D12A FB79 926B 994E
> > > openSUSE 11.3, Kernel 2.6.34.12-desktop, KDE 4.5.0
> > > Intel Core2 Quad Q9400 2.66GHz, 8GB DDR RAM, nVidia GeForce 9600GT
> > If your signature line is correct, and you're running kernel 2.6.34,
> > you could try upgrading to 2.6.35 from Kernel:Head.  This has been
> > discussed a fair bit here on the mailing list with various solutions.
> > The one that worked for me with all nVidia/openSUSE11.3 combinations
> > was a kernel upgrade (and of course re-installing the nVidia binary
> > driver)
> >
> > C.
> Turning of KDE4's desktop effects (i.e. suspend compositing) will drop the CPU
> usage to near zero again. Consistently repeatable here but things are much
> better with the 256.44 drivers and 2.6.35.1-1 kernel. Still, if I want max
> performance while watching video/tv on the desktop, either full-screen video
> or disable compositing is the way to go. It seems that KDE4's eye candy (esp.
> Blur) works the X server pretty hard - perhaps there's some mutual
> optimisation that still needs to go on.
>
> I did notice that switching off Blur (I *think* it was Blur, anyway) did make
> a significant difference in CPU usage. It might be worth switching off the
> desktop effects one-by-one to see if there is a consistently repeatable
> pattern. If there is, then a bug report is in order.
Same here on two machines - one with an NVIDIA card and another with an 
ATI card. I've reported this as an  bug against KDE because the same 
Xorg/driver stack on both machines runs GNome + compiz without any issues.

https://bugs.kde.org/show_bug.cgi?id=248729

-- 
Regards,
Vadym


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