I tried posting this in General Help, but I think this is probably the proper place for it.
Strange problem, system boots normally, I get the splash screen with the 'dots' but then nothing.
I can Ctrl-F1 to a terminal, login and then run startx& and the KDE desktop runs fine (although Muon doesn't authorise now and there are another couple of issues)
Looking in syslog, the only things that do not look right are
kdm.log is empty
Nov 19 10:57:58 AMARI-UBUNTU kernel: [ 17.878884] init: apport post-stop process (951) terminated with status 1
Nov 19 10:57:58 AMARI-UBUNTU kernel: [ 17.923107] init: kdm main process (912) killed by TERM signal
Nov 19 10:57:58 AMARI-UBUNTU kernel: [ 17.938369] init: gdm main process (950) killed by TERM signal
nothing weird in Xorg.0.log
I don't know enough about the boot process to delve much deeper
Any ideas or pointers please .....