kde-3.3 and opengl

[Andrea Magatti]

Hi all,
seems like i have a strange problem.
I'm using gentoo for amd64 with a nvidia quadro fx500, i've installed nvidia 
drivers. Kernel modules and nvidia drivers and extension work correctly ( as 
detailed in xorg log files).
If i login in fluxbox or blackbox opengl works correctly (glxgears at 4000 
fps), but if i try the same test after login in kde-3.3, glxgears runs at 20 
fps ! even kde GL screensaver run very very slowly.
I was thinkingit could be a qt problem (ie: qt compiled without opengl 
support), but i verified that opengl flag has been used during qt 
compilation.

Any suggestion? (about kde configuration)

Thank
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