[Bug 119281] kmail composer suddenly becomes very slow

[Luke Plant]

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





--- Comment #50 from Luke Plant <L Plant 98 cantab net>  2009-03-07 15:56:37 ---
I managed to improve my graphics drivers, and the problem has gone away for me.

(Details: I'm running KDE 4.2.1, Ubuntu Jaunty (pre-release), graphics card ATI
Technologies Inc Mobility Radeon HD 3650, using new radeonhd driver as
described here:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/334101 )

So this is definitely related to hardware acceleration, but kmail is unusual in
that it has such bad performance with some graphics cards/drivers, when no
other text editor is like that.

BTW, the strange behaviour of page up/page down is still the same for me.  The
scrolling is now fast enough to be tolerable, but it is not ideal.  I didn't
see this in KDE 3.5.

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