Desktop effects slow monitor performance

Clay Weber claydoh at
Tue Mar 22 13:50:11 UTC 2011

On Tuesday, March 22, 2011 08:49:28 AM Isak Enström wrote:
> On 22/03/11 11:14, Georgi Kourtev wrote:
> >> It is DELL inspiron 1525 laptop.  Below is the output of lspci | grep
> >> (hope this is the correct command):
> >> 
> >> 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960
> >> Integrated Graphics Controller (rev 0c)
> > 
> > sudo lshw -C video
> > 
> >    *-display:0
> >    
> >         description: VGA compatible controller
> >         product: Mobile GM965/GL960 Integrated Graphics Controller
> >         vendor: Intel Corporation
> >         physical id: 2
> >         bus info: pci at 0000:00:02.0
> >         version: 0c
> >         width: 64 bits
> >         clock: 33MHzMobile GM965/GL960 
> >         capabilities: msi pm vga_controller bus_master cap_list rom
> >         configuration: driver=i915 latency=0
> >         resources: irq:45 memory:fea00000-feafffff
> >         memory:e0000000-efffffff
> > 
> > ioport:eff8(size=8)
> That looks like the same laptop my wife uses. She's running Linux Mint
> Gnome without problems (with Compiz enabled), I have only briefly tried
> KDE on it. If you got time you could perhaps try installing Compiz just
> to see if the problem persists using "apt-get install --no
> install-recommends" (to avoid installing unwanted dependencies)
> --
> Isak
> ***
> Powered by CrunchBang Linux

I have a Dell Latitude D630 with the intel Mobile GM965/GL960. No problems at 
all with kwin here, the D630 is running Natty most of the time, in 10.10 I do 
not recall any issues either, and me loves me Blur effect, thats for sure :). I 
don't know the refresh rate issue could be, aren't lcd screens pretty much 
locked to one value?

imo, intalling compiz is just adding one extra layer of complexity as  you 
have to install, set up, and then (hopefully) it runs :)

A perhaps better thing to try is to try delting your ~/.kde/share/config/kwinrc 
from *outside* of KDE, to try and regererate a fresh clean copy. Or create a 
new user account to see if the problem is systemwide or user-specific (hence 
the deletion of the kwinrc file)

Another option to try is  to install updated intel video drivers from Ubuntu 
Xorg team's ppa for stable upstream drver releases:
You can see if that works, but if not , reverting is fairly easy: install the 
package ppa-purge, then in a terminal enter:
sudo ppa-purge ppa:ubuntu-x-swat/x-updates 
and you will go back to 'stock'.

Clay Weber 

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