Hello Roman.
> I used the graphical install for the system installation and initially
> left the default Alt+Shift to switch the layout. This worked fine
> during the installation.
>
> However, now I have to press it multiple times to switch from English
> to another language. Finally, after switching, I cannot switch back to
> English. Instead, when pressing the shortcut, the console occasionally
> gets into a state where it does not show any input until the layout is
> switched back to non-Latin. Enter key and other shortcuts stop working
> entirely.
(keyboard-layout (keyboard-layout "us,ua"
#:options '("grp:alt_shift_toggle")))
does work for me, although grp:shifts_toggle does not. Possibly
grp:shifts_toggle would only work on some keyboards?
If your stuck console state is a real bug and not due to xoff/xon flow
control (i.e. Ctrl-S was pressed), then this is a bug with some software
used by Guix, maybe the Linux kernel, or with console-setup. Though I
cannot reproduce it with grp:alt_shift_toggle.
GNOME has its own settings that are configurable inside the GNOME
Keyboard Settings.
Regards,
Florian