http://forums.opensuse.org – As the title says. System is openSUSE 11.1 running KDE3.5 with KDE4.3 also installed to use desktop effects in KDE3.5. After update X uses 90% CPU to scroll down a page in FF, OOo or even in text editor, either with KWin and KWin4. With KWin4 desktop effects can't be enabled in system config. From Xorg.conf: Code: Section "Device" BoardName "ATI Radeon HD 3200 Graphics" Driver "fglrx" Identifier "Device[0]" Option "XAANoOffscreenPixmaps" "true" Option "Capabilities" "0x00000000" Option "OpenGLOverlay" "off" Option "FSAAScale" "0" Option "FSAAEnable" "off" Option "VideoOverlay" "on" Screen 0 VendorName "ATI" Rolling back to kernel 2.6.27.37 fixed the problem. (Distributions)