After last boot this older build now suffers from a Kernel panic Error. Fixed with echo 'acpi=off' | sudo tee /etc/kernel/cmdline.d/acpi=off then clr-boot-manager update . BUT error if allowed to reboot normally. (:
So what did I miss, that I must spam the space-bar to select Solus 4.3 to start pc ?
Original errors, Kernal panic not syncing: Attempting to kill init exitcode = 0x00007f00
and then from solus-Live, ACPI BIOS error (bug) could not resolve symbol [_SB.PCI0. ....