Bug#471456: Very high CPU usage while resizing/scrolling/using it

[Xavier Cremaschi <omega.xavier@gmail.com>]

Brice Goglin a écrit :
> Xavier Cremaschi wrote:
>   
> > Package: xserver-xorg
> > Version: 1:7.3+10
> >
> > Xorg is eating lot of CPU (up to 100%) on trivial tasks such as :
> > - scrolling with Shift+PageDown in a big openoffice calc spreadsheet
> > - resizing the default Xfce Terminal
> > - scrolling in big web pages with iceweasel
> > - switching for tab to tab with iceweasel
> > I do not use compiz, fusion, or anything else like that.
> > My deskop manager is Xfce 4.4.2.1
> >
> > After having found this link :
> >     http://lorenzod8n.wordpress.com/2007/12/23/xorg-73-in-sid-harmful/
> > I tried to downgrade xserver-xorg (and only xserver-xorg) to Xorg
> > 1:7.3+7, determining it was the right version to test by using the
> > date on this blog +  http://snapshot.debian.net/
> >
> > Everything is fast again, I can re-use openoffice and iceweasel normally.
> >     
>
> Try adding
>     Option "AccelMethod" "XAA"
> to the device section of your xorg.conf
>
> Brice
>
>   
Interesting behaviours :
- 7.3+10 : fast on laptop screen (1024x768)
- 7.3+10 : a cpu glutton when switching on external screen (1920x1200)
- 7.3+10 + XAA option : fast, but I cannot use xv for my videos, only x11
So EXA (default choice) is better for xv, I will stay on 7.3+7 until 
problem is solved (maybe GLX_EXT_texture_from_pixmap, maybe not)

Xavier.