I eventually solved the problem when I had to reinstall LL 5.0 (due to the system locking up/freezing.
I found in the Bios a line referring to sticky keys (I think that was the title) and set it differently ("enabled", I think).
Now it is working fine.
I found in the Bios a line referring to sticky keys (I think that was the title) and set it differently ("enabled", I think).
Now it is working fine.