Looking at /run/user/1000/xpra/:7.log I saw a warning in the first line saying that uinput could not be used. So I 1) installed python3-uinput 2) created a /etc/modules-load.d/uinput.conf file containing the word "uinput" 3) created a /etc/udev/rules.d/99-input.rules containing the line SUBSYSTEM=="misc", KERNEL=="uinput", MODE="0660", GROUP="input" 4) after loading the uinput module, I changed the permissions of /dev/uinput to "0660" and group to "input" 5) added my user to the "input" group Now, when I start xpra, the first two lines of the log say: Warning: cannot use uinput '-config' argument not found in the xvfb command and I don't know what to try next