Laptop brightness remains at 100% after every login

Rahim

Married!
Hello Guys,
I have upgraded PCLOS to KDE 4.6.1 and now after every login, my laptop's brightness(DELL Studio) remains at 100%, which i have to manually change. But it goes back to 100% after every login.

Another issue is after upgrading to KDE 4.6.1, the graphics performance is sluggish (tearing, slow and delay in movement of windows etc). It was fine earlier with the same driver ATI Radeon 2000 and later option in KDE 4.5.
 
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