Simple question - which driver are you using, and did you notice any difference when switching from stock (188?) driver.
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If you switch to any other driver you lose the switchable graphics and also probably brightness control.
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You should read this thread for more informations about hybrid graphics on the Z.
Z11 / nVidia GT330m / Which driver?
Discussion in 'VAIO / Sony' started by Ungjaevel, May 8, 2010.