slow Qt4.7

Hi all,

I have compiled Qt4.7.4 and installed it on my mini2440.
When I run the refreshtest example I have 16 Fps. With the 6.3 libs this
was 31 Fps. The oscilloscope example is very very slow ...
Is the a way to optimize this or do I have to use the Qt6.3 libs ?

When I run ts_calibrate the console shows the message : selected device is
not a touchscreen I understand

Altough the touchscreen works on all Qt-applications !
the Qt calibrate example does not work as well

The only way to calibrate my touchscreen is to launch it from qtopia.

Any idea ?