Alt + F4 switches to TTY4
Since yesterday Alt+F4 is working unexpectedly on my computer. When I press those keys TTY4 is opened. Also, the application which is running on the GUI receives the Alt+F4 message. This is solved by rebooting the system, but after a while it starts doing this again.
As far as I have googled there are other people finding this problem but with no solutions (1, 2).
I am running Ubuntu Gnome 16.10, Kernel version 4.8.0-39-generic and GNOME Shell version 3.20.4.
Solution 1:
I had this recently on Ubuntu GNOME and on Unity. The answer is this:
sudo kbd_mode -s
Run that in a terminal and then the Alt+F4 keyboard combination returns to normal.
From kbd_mode man page (from kbd project and package):
kbd_mode - report or set the keyboard mode
Without argument, kbd_mode prints the current keyboard mode (RAW, MEDIUMRAW or XLATE).
With argument, it sets the keyboard mode as indicated:
-s: scancode mode (RAW),
Solution 2:
-
As root, edit
/etc/console-setup/remap.inc. -
Add this line at the bottom:
alt keycode 62 = VoidSymbol -
Run
sudo dpkg-reconfigure console-setup -phigh -
Reboot (
reboot).
The problem should be fixed now. At least it worked for me.