Hi, I use openBSD as workstation,and openBSD 6.4 was frozen when using screensaver with lxqt so as workaround, I have installed xfce4 instead lxqt. I don't know if it comes from lxqt or from X or from openBSD... I have a corei7 950 with an asus p6t motherboard, and an amd radeon r5 230.
best regards Stéphane L . from france
