On Sun, Nov 03, 2019 at 07:49:18PM +0100, Riccardo Mottola wrote: > X11 works, but I use WindowMaker and it is unusable now (and WPrefs > neither). All displayed characters are replaced with rectangles with small > numbers (like when special characters cannot be displayed): everything, > menus, window titles, etc. Unreadable.
This usually means you're missing a font. Try installing more, e.g. vera-ttf or efont-unicode or ubuntu-fonts (just guessing, no idea what WindowMaker needs). Thomas