today I used a different PC than I'm usually using for my OpenGL development. On my standard PC I run Win7 with Windows Aero ... everything works just fine. But on this new maschine I get a different result using Viewports:
Normal PC / different PC with basic (intended):
different PC with Aero (problem):
It appears that for same reason the glViewport(5, 5, widht, height) gets transformed to glViewport(10, 0, width, height) ... or something like that. I checked the glViewport call and the values are correct but the result stays flawed.
Also interesting: as soon as I change the displayMode or manually resize the window the viewport gets applyed correctly.
Can someone explain why this problem occurs?