16.04 - Update 14.04LTS to 16.04LTS bricked - Ask Ubuntu


i have dell optiplex 9020 running ubuntu 14.04lts. ubuntu complained out of date , no longer providing security updates. of course, did not offer way upgrade, looking on stackexchange, found following advice:

can smoothly upgrade 1 lts next lts release?

sudo apt-get do-release-upgrade

now machine locks after booting. can't see in log. there text cursor. alt-f* not work shell.

i can press power button, , shows ubuntu logo before shutting down in controlled manner. linux running.

any ideas how recover system? assuming should type options in grub.

booting linux 3.16.0-77-generic (recovery mode)

recovery mode shows:

started user manage uid 112 started automatic usb/bluetooth printer setup... failed start network manager wait online

at point ctrl-alt-del not work, pressing power button continue through sequence , shut down.


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