Seems I spoke too soon about KaOS working well on my system. On waking from suspend many times yesterday everything came up fine. On waking this morning I got the login screen OK, then blackness. Tried rebooting and login went fine, then the solid black screen. This time with a mouse cursor that was movable but nothing else. Likely a video driver issue but not sure how to troubleshoot. Any ideas?
Well, after booting up Manjaro, writing this post, logging out and rebooting, KaOS seems to have come up OK. Will look into the video driver while things are up and running.
It occurred to me that there could have been a power dip overnight due to high demand with very cold temps. When rebooting the first time I didn't shut down completely, and if there was a 'brownout' the problem would not have been corrected. When rebooting the 2nd time I did power off totally and things are restored. Not seeing anything I want to change video-wise attm so will leave well enough alone for now.