Using X.org version: 6.7.0 (Fedora Core 2) with KDE 3.2

Trouble with ‘sticking’ Alt key, especially when using the Gimp.

Seems to be fixed by adding this XKbOptions line to /etc/X11/Xorg.conf:

Section "InputDevice"
    Identifier  "Keyboard0"
    Driver      "keyboard"
    Option      "XkbLayout" "us"
    Option      "XKbOptions" "altwin:meta_win"
EndSection

This makes the left Windows key give the Meta keysim.
Then KDE or your other window manager can be configured to use Meta as the modifier key for interior window events like move etc.

This setting can also be changed in the running X server with:

setxkbmap -option "altwin:meta_win"