The culprit is as VF said: in /etc/X11/xorg.conf the option ' Option "XkbOptions" "lv3:ralt_switch" ' is written, and it should not be.
Workaround:
Edit that file with sudo privileges and put a '#' in front of the line ' Option "XkbOptions" "lv3:ralt_switch" '
Save open documents and restart X (Ctrl+Alt+Backspace)
Hopefully the program that sets this option can be fixed soon.
The culprit is as VF said: in /etc/X11/xorg.conf the option ' Option "XkbOptions" "lv3:ralt_switch" ' is written, and it should not be.
Workaround: Backspace)
Edit that file with sudo privileges and put a '#' in front of the line ' Option "XkbOptions" "lv3:ralt_switch" '
Save open documents and restart X (Ctrl+Alt+
Hopefully the program that sets this option can be fixed soon.