on a a IBM Lenovo Laptop T60 there is a "Fn" key to adjust the screen brightness and such.
That "Fn" key has the same keycode than the DEL key.
Therefore I can't change the Fn key with xmodmap (because I would change the DEL key the same way.)
When I adjust the screen brightness, I lose characters in the editor.
Unfortunately the Fn key REPEATS firing delete while the key is pressed.
And several times I didn't notice the loss before saving and leaving the editor.
Here is the output of xev when I press the Fn key: (Pressing the DEL key would yield the very same output.)
KeyPress event, serial 20, synthetic NO, window 0xa00001,
root 0x101, subw 0xa00002, time 42594031, (35,42), root:(259,282),
state 0x0, keycode 107 (keysym 0xffff, Delete), same_screen YES,
XLookupString gives 1 bytes: (7f) "<7f>"
XFilterEvent returns: False
What can we do?