Comment 2 for bug 1914953

I can confirm this bug.
But a qemu machine seems unaffected.

There is another effect:

Step 1: Let the GRUB console start.

Step 2: select console as terminal_input and terminal_output. This is the default anyways.

Step 3: set a non-US keyboard layout
since console is the active terminal_input, the new layout has no effect yet

Step 4: set console AND at_keyboard (both! This is possible) as terminal_input
now ALL keys you press are handled by at_keyboard. You can detect this because the non-US keyboard layout is used for all keys pressed. There is no delay, everything just works great right now.

Step 5: activate gfxterm as terminal_output
Now strange things happen: press a key that would be affected by the non-US keboard layout. You get random output now: the character you see can be affected by the non-US layout, it can be the US layout character or the keypress does nothing at all.
The only difference to step 4: gfxterm is active

Why does gfxterm affect at_keyboard?