Intel GMA X4500 Mobile: do_wait: drmWaitVBlank returned -1 (OpenGL)

[Sasa Vilic]

Hello,

I am developing QT application that uses OpenGL for drawing. When running
this application I always get message:

do_wait: drmWaitVBlank returned -1, IRQs don't seem to be working correctly.

Try adjusting the vblank_mode configuration parameter.


After that, the painting area is black (instead of white) and painting is
not done very well.

*I am not sure if this I a bug or it could be avoided through different
configuration.*

I am using QT 4.7 (SDK downloaded from nokia website),
running linux 10.04 (2.6.32-25-generic) on
Asus K50IJ (Intel GMA X4500 graphic card).

Best regards,

Sasa
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