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I have a Dell Optiplex 9020 which was running Ubuntu 14.04LTS. Ubuntu complained that it was out of date and no longer providing security updates. Of course, it did not offer a way to upgrade, but looking it up on stackexchange, I found the following advice:

Can I smoothly upgrade from one LTS to next LTS release?

sudo apt-get do-release-upgrade

Now the machine locks up after booting. I can't see anything in a log. There is a text cursor. Alt-F* does not work to get to a shell.

I can press the power button, and it then shows the ubuntu logo before shutting down in a controlled manner. So Linux is running.

Any ideas as to how to recover my system? I am assuming I should type some options in grub.

Booting with Linux 3.16.0-77-generic (recovery mode)

Recovery mode shows:

Started user manage for UID 112
started automatic USB/bluetooth printer setup...
Failed to start Network manager wait online

At this point ctrl-alt-del does not work, but pressing the power button does continue through the sequence and shut down.

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Dov
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  • Have you tried booting a LiveCD and exploring the logs on the Internal Disk, and/or backing up data? – negusp Oct 28 '16 at 13:10
  • Can you log in via recovery mode? If so do it and try sudo start lightdm. Might give some clues – innisfree Oct 28 '16 at 13:42
  • 14.04 is still supported, so I am not sure what you saw about it being out of date. – Organic Marble Oct 28 '16 at 13:44
  • https://wiki.ubuntu.com/1404_HWE_EOL – innisfree Oct 28 '16 at 13:51
  • I just tried recovery mode. It tries to start LWM, then something fails in the network. But the screen gets wiped out and it goes by too fast. – Dov Oct 28 '16 at 15:41
  • 14.04LTS update said "this product is no longer updated. Security patches are no longer being distributed." – Dov Oct 28 '16 at 15:49
  • 14.04 is supported until April 2019 - it would be interesting to know what was causing the message that you saw. Have you tried booting with nomodeset? – Charles Green Oct 28 '16 at 16:37
  • the screen goes blank until I press power or ctrl-alt-del, then it's too late. How can I capture the log so I can paste it here? – Dov Nov 07 '16 at 20:20

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