Hans (12025-02-10): > However, it is clear, the functions like screen brightness etc. stop working, > as soon as the kernel loads.
That is not surprising. Before the kernel loads, the key are handled by the firmware and control the computer. After the kernel loads, the keys are handled by the kernel and generate keyboard events that will be dispatched to the various programs that might want to interpret them. The first step for you is to check if the keys stop working at all or not. So, you look at all the /dev/input/event* devices, and you do, with root privileges: xxd /dev/input/event0 and press a few keys. If it prints something, you know the keys work. If it prints nothing, you break it with ctrl-C and you start again with event1, then event2, etc., until either you have found the keys work or you have exhausted the event devices. Regards, -- Nicolas George
