Hello, I was able to find an easy workaround for this problem:
0) Make sure xserver-xorg-input-evdev (or some other input driver to handle the keyboard and mouse) is installed. If your system is not brand-new, they are probably installed anyway 1) Disable the configuration that causes libinput to be used: sudo mv /usr/share/X11/xorg.conf.d/40-libinput.conf{,.disabled} 2) Restart X Maintainers: Do you know if this has been reported upstream? Conversely, do you know of a reason to suspect that this is a Debian-only problem? Thanks for your good work, Shai.