17:13:22slac-in-the-boxstumpwm glitched out, but couldn't reproduce it after reboot: had xrandr set to --output eDP --below HDMI-A-0, and HDMI-A-0 was vertically split, and thunderbird was open on the right frame, but if I opened a menu, lke File or Edit, the pull down menu appared on the lower head--items were still selectable, just the menu was on the wrong head... after reboot, and duplicating setup, everything is fine again...