+ Christof Wolf <ch.wolf@hfph.mwn.de>:
What is the output of 'xinput test 2' during this experiment? not sure, what do you mean? on a Console?
I think he means this: Open two terminal windows (or two xterms). In one window, run xinput test 2 and let it run. In the other, run xev. If I do this, put the cursor in the xev window and press and hold the down arrow key for a while, the output from xinput test 2 is only key press 133 key release 133 (the second line appears when I let go of the key) while in the xev window I see numerous keypress and keyrelease events for keycode 133. In other words, the xev output shows the key repeating, the xinput output does not. (Hence I am not sure what useful info the test will reveal in your case, but I expect Jeremy has a notion.) - Harald