I'm not sure what happened but the pacman update on ZSH gave a warning about conflicting permissions. I exited the shell after the update and ended up with a system freeze and garbled graphics on the screen. I rebooted with an older kernel but my main drive kept unmounting when I was trying to back up data which crashed the system. So, update or hardware issue? I'll need to investigate. But I like the feel of MX Linux so far...