X freezes when desktop changes
I installed the last 177.70 drivers and I see that something is better, but the computer hangs often for less than a second when big (maximized) windows appears on the screen. Moreover, when the desktop wallpaper changes (I have a slideshow), the computer hangs for about 10 seconds. Every time.
I have an nvidia quadro nvm 145m on a dell laptop d830. I run kde4.1.