Thank you Dan, >>>> - when I iconify certain xterm, they display and icon or the get to >>>> display xterm with "unreadable" fonts. >>> >>> See the IconFont style or else it's a DPI issue with your XServer? >> >> "Unreadable" is one of the default font size in xterm. When you >> CTRL-Right click in xterm, it displays a list of font size, including >> "unreadable" (very tiny, like 2x2 pixel/character) >> >> When xterm is running on the same host as fvwm, the xterm is not >> properly iconified, instead it is changed to font size unreadable. > > You've got xterm active icons configured. > Check the xterm man page.
That was it. Best regards, Olivier