But maybe this helps:
I also set the keymaps Andreas already described. After an X restart i´m able to use the brightness keys and the keyboard gets stuck.
But i can still switch to a console with the ALT+CTRL+F1-F6 keys. After switching back to X with CTRL+ALT+F7 i am able to use the keyboard again. If i use the brightness keys once more the brightness goes down to 0% or up to 100% without an release event.
I have the same problem.
But maybe this helps:
I also set the keymaps Andreas already described. After an X restart i´m able to use the brightness keys and the keyboard gets stuck.
But i can still switch to a console with the ALT+CTRL+F1-F6 keys. After switching back to X with CTRL+ALT+F7 i am able to use the keyboard again. If i use the brightness keys once more the brightness goes down to 0% or up to 100% without an release event.