Today I ran into an issue where my keyboard stopped working in KDE (Fedora Core 10, KDE 4.1). I just updated some rpm’s which included the xorg ati drivers and thought that might have been the problem. I logged out of KDE and into XFCE where the keyboard worked fine… doh!
I googled and discovered the problem was in my ~/.kde/share/config/kaccessrc file. The SlowKeys attribute was set to true (SlowKeys=true). I set the attribute to false (SlowKeys=false) and all is well once again.
I set the SlowKeys attribute to true when I was working in Gimp. I held the shift key down and was hunting for the key I wanted to select with the shift key when a box popped up asking ‘Do You Really Want to Activate “Slow Keys”’. Unfortunately, I did not understand what the consequences would be and clicked Yes. After updating some KDE apps, I logged out of KDE and logged back in… to a keyboard which did not work.
If you encounter this popup, select No. If you find your keyboard does not work in KDE, follow the directions above.