okay turned back the clock .. to a spinning metal disk previously installed in this hardware .. ran a number of test installs all work fine .. cosmic/bionic/disco early version disco final all work boot normally .. always ..
thus conclusion is a SSD is very fast and can respond to requests sooner than a spinning metal disk this throws off the timing of a number of boot processes .. which become out of sync.. due to the " slower processor " now the first boot into a fresh install is not effected as a very extended plymouth start occurs .. due to " automatic-updates?? or disk checks or something ?" the rest of the boots are too fast for even plymouth to load properly due to a not yet loaded kernel video module .. thus it only flashes the screen red briefly .. then xorg/lightdm crashes for the same reason(?).. delayed kernel module load .. then a second successful try if still booting from "native" grub ..else no retry and lock-up -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1821609 Title: lightdm login screen briefly appears and then blanks out on Intel(R) Core(TM)2 Duo CPU T5870 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1821609/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
