Created attachment 9407 [details]
System log from failing session
On booting from the Plasma Live DVD, after the initial Plasma startup splash sequence is displayed, the screen goes black and the Plasma desktop does not appear. MageiaWelcome is displayed, and is fully functional. Ctrl-Alt-L will bring up the lock screen, and from there a new session can be started that gives a working desktop. Unlocking the original session just returns you to the black screen.
This is fairly intermittent - maybe one time in ten.
Looking in the system log (attached), the failure looks to be here:
Jun 10 17:11:03 localhost ksmserver: ksmserver: Autostart 2 done
Jun 10 17:11:03 localhost ksmserver: ksmserver: IO error opening ICE Connection!
Jun 10 17:11:03 localhost ksmserver: ksmserver: autostart service ("/bin/plasmashell", "--shut-up") finished with exit code 13
I have only observed this in VirtualBox, but have no reason to believe it won't occur on real hardware too.
I have resolved/moved: https://bugs.mageia.org/show_bug.cgi?id=20874
to this bug
During council meeting tonight it was agreed to change this from a release blocker bug to a "for errata" bug and to suggest rebooting when someone hits it.