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In older versions of Ubuntu I used to be able to get a character based login screen by pressing Ctrl + Alt+ f1 (or F2 or F3...).

After I upgraded to 16.04 LTS this no longer works. All I get when I press Ctrl + Alt+ f1 is a dark, blank screen. (Using Ctrl+Alt+f7 to switch back to the graphical user interface works.)

How can I fix this?

EDIT

I was trying to experiment with @sudodus' comment below, but before I got that far, I discovered some strange behaviour.

  1. Sometimes I can get the consoles to work, but not always.
  2. Sometimes the consoles display a login prompt, but do not accept any input.
  3. Sometimes the computer locks completely when I press Ctrl+Alt+F1. (I can't event ssh to the computer from another computer.)

Perhaps what I really need is a fresh install... Sigh! :-(

EDIT

I just updated my computer from 4GB to 8GB of RAM. This solved the problem. (Confusing, I think; but I'm happy now.)

oz1cz
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  • It works for me in 16.04.1 LTS. Maybe there is some problem with the graphics. What happens if you boot with the boot option nomodeset, or with GRUB_TERMINAL=console via '/etc7default/grub' and 'sudo update-grub'. See this link: https://help.ubuntu.com/community/Grub2/Setup – sudodus Dec 23 '16 at 15:20
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    For reference, possibly a duplicate of (for example): http://askubuntu.com/questions/162535/why-does-switching-to-the-tty-give-me-a-blank-screen . It seems to work for me (for now) by setting both GRUB_TERMINAL=console and GRUB_GFXMODE=640x480 – michael Jan 31 '17 at 08:58
  • see also (unrelated, but similar search terms might lead one to the wrong question) https://askubuntu.com/questions/979027/how-do-i-switch-between-console-mode-and-gui-in-17-10 – michael Mar 01 '18 at 04:16

2 Answers2

1

As indicated by the EDIT in my post, the problem was solved by increasing the amount of memory in the computer.

oz1cz
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-2

sudo /etc/init.d/lightdm restart working by me.

lahtis
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