I finally was sufficiently annoyed with the crash/reboots, that I backed up the data off of the ultrabooks SSD drive (where given this is a new install there was not much to backup) and did a Full repository vendor change to X11 : XOrg repo.
I didn’t have much confidence in the laptop being able to boot after such a repos system/priority change ( 211 packages updated) but to my pleasant surprise the Lenovo booted ok afterward. I will now monitor to see if this is stable, or if it continues to crash/reboot now and then.
Here is the graphics part from ‘inxi’ :
Graphics: Device-1: Intel TigerLake-LP GT2 [Iris Xe Graphics] driver: i915 v: kernel
Device-2: Chicony Integrated Camera type: USB driver: uvcvideo
Display: x11 server: X.Org 1.20.13 driver: loaded: modesetting unloaded: fbdev,vesa resolution: 1920x1200~60Hz
OpenGL: renderer: Mesa Intel Xe Graphics (TGL GT2) v: 4.6 Mesa 21.2.4