[Bug 119281] kmail composer suddenly becomes very slow

[Ray Ferguson]

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http://bugs.kde.org/show_bug.cgi?id=119281         




------- Additional Comments From foo share-foo com  2007-06-03 21:18 -------
Confirmed word wrap trigger.  Happens to me too.  It seems that word wrap causes a serious amount of 2D graphics load that pegs the CPUs and causes delay.

Found fix/work around.  I hesitate to call it a fix since I think it worthwhile to find out what causes the graphics load for such a simple thing as performing word wrap.

My setup: 
OpenSuse 10.2 on thinkpad t60p w/ ati FirGL 5250 and proprietary driver from vendor package repository: http://www2.ati.com/suse/10.2
ati-fglrxG01-kmp-default-8.36.5_2.6.18.8_0.3-1.1
kmail 1.9.5 on kde 3.5.5

I added 

  Option "XaaNoOffscreenPixmaps" 

to the firgl device section of the xorg.conf file as suggested here: http://wiki.cchtml.com/index.php/Performance_Issues

and the problem went away.  The option is described in xorg.conf as

"Disables accelerated draws into pixmaps stored in offscreen video memory."