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#1 2010-09-30 08:16:49

amen
Member
Registered: 2009-08-02
Posts: 44

[SOLVED] catalyst-test and slow scrolling in Qt4 apps

Hello.

I have Radeon HD4650 AGP video card.
I installed package catalyst-test from AUR.
I have orginal xorg.conf generated by 'aticonfig --initial'.
I have kdemod3(without compiz-fusion).

The problem is:
- slow and laggy scrolling pages with text and images in Qt4 applications.

Qt3 and GTK apps runs smoothly(almost - little slow redrawing windows in opposite to xf86-ati-video driver).

I tried run Qt4 application with parameter '-graphicssystem opengl' and effect is better but still slow scrolling. Moreover drawing menus is slower.
I tried also Qt4 application with parameter '-graphicssystem raster' and runs perfectly.

So adding parameter '-graphicssystem raster' to *every* Qt4 application is the solution, but not *practical* solution.

Is other solution for this problem?
If not, how can I add parameter '-graphicsystem raster' to every Qt4 application one time.(I want write '-graphicsystem raster' once not e.g. 50 times).
Can anyone help?

Last edited by amen (2010-10-04 05:56:16)

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#2 2010-09-30 12:18:52

dobo
Member
Registered: 2010-07-09
Posts: 21

Re: [SOLVED] catalyst-test and slow scrolling in Qt4 apps

I you're using qt >= 4.7 you can set global variable to change graphics system.
Create ~/.kde4/env/qt-graphicssystem.sh:

export QT_GRAPHICSSYSTEM=raster

Or you can use gui - kcm-qt-graphicssystem.

Last edited by dobo (2010-09-30 12:19:41)

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#3 2010-09-30 14:11:14

amen
Member
Registered: 2009-08-02
Posts: 44

Re: [SOLVED] catalyst-test and slow scrolling in Qt4 apps

dobo: Thanks a lot for the tip. :-)

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