I am running KDE 4.10.4 on openSUSE 12.3. My hardware is an i7-2600k and Geforce 660 Ti with the 319.23 driver from the Nvidia website. I have two monitors, one is a Dell 1920x1200 and the other is an Acer 1920x1080 running in Twinview with the Dell being the primary and the Acer set to be right of the Dell.

In single monitor mode everything is very smooth. However, when I run dual monitors my window minimizing becomes intermittently laggy. I would think my hardware is more than enough to adequately drive two displays without things getting laggy. Is there something I need to tweak to get things smooth dual monitor mode?

Also, when I play a video in VLC fullscreen on the Acer monitor I lose the ability to click the taskbar in the panel(located on the Dell screen) to minimize windows. Once I close the video I can click the windows and minimize them normally. Is this a bug in KDE? Thanks.