okay I have another solution to the timing issue .. add two partition mounts to fstab ..
my existing sda1 disco install has /home (sda2) and /home/store1 (sda5) mounted via fstab .. this was the original install configuration .. thus always a mount delay .. to test .. added the same partions to mount on /home/oldhome and /home/store1 respectively on newly installed sda9 - disco xubuntu final and no crashes .. ..plymouth shows up .. xorg/lightdm start normally ..just enough delay to let everything else happen .. all using the "foreign sda1 installed grub" .. so all the errors are due to "faster than expected storage media response time" .. some slumbering boot timing issues waiting to cause trouble .. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs