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First of all, don't judge me instantly, this might seem like duplicated question but honestly, I can't find solution to my case. That's why I came here.

Okey here's the deal. I started my morning by starting my computer and log in to Ubuntu. Everything worked like a charm! Then, just like time to time, system updater popped up and there were couple updates. I checked them, and everything looked great and then I clicked "install" or "update" - for some reason not sure what that button says, but anyway... Then, meanwhile I was finishing my coffee, the updates finished and I decided to start my workday. At the moment I'm working on with big video project so I opened kdenlive. But unexpectedly it doesn't opened at all, and kdenlive wasn't only one whom behavior was weird. So I was still bit sleepy so I haven't enough energy to start figuring out what's going on so I decided restart computer and crossed my fingers that it would be magic reboot. Well.. it wasn't.

Login loop decided to stopped by. First reaction was, oh sh*t is my system broken? Did I lost everything?

I guess I didn't. I assuming I could fix this if I'd be able to open TTY. ctrl + alt + f1 give me black screen. I followd this answer: Graphics issues after/while installing Ubuntu 16.04/16.10 with NVIDIA graphics

and I edit my GRUB and I placed nouveau.modeset=0 in there and reboot my system but no luck.

After couple of hours I figured that TTY is the only way how I can get this working again, right? Do you have any suggestion how could I open my TTY and get rid of the login loop? I really appreciate every reply.

Thank you!

EDIT When I place nouveau.modeset=0 in GRUB and reboot, this come: /dev/sda8:clean, 412123/3055616 files, 2982833/12207104 blocks

when this is on the screen, I'm unable to type anything and after couple seconds the normal login screen appear and I'm still unable to open TTY.

-Cecily

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Ctrl + Alt + F2 to get to a terminal. Login then shut down the graphic interface:

sudo service lightdm stop

Then update:

sudo apt-get update

then get rid of all nvidia stuff:

sudo apt-get purge nvidia-*

then try:

sudo apt-get install nvidia-340

Then

sudo reboot

Hope that helps! This is just a from-memory suggestion on similar issues I've had.

  • I'd be more than glad to do that, but the problem is that I can't get to the terminal. – Cecily Miller Nov 4 '16 at 10:25
  • I meant a TTY terminal. Try ctrl-alt-f1 or ctrl-alt-f2 (etc) until you get one. Might have to hold down for a bit. What happens when you try? – Joseph Santaniello Nov 4 '16 at 10:30
  • ctr-alt-f1-6 each one shows only black screen. – Cecily Miller Nov 4 '16 at 10:34
  • Try holding down shift when rebooting to get to the grub menu. Use "e" (as I recall) to be able to do temporary editing of what grub will use. Remove "splash quiet" and add "3" at the end of that line to tell the system to boot into run-level 3 which is just console/text mode. And maybe also change whatever it says after gfxmode to "text" (no ") so it doesn't try to change grapichs mode in th emiddle of the boot. And then ctrl-x or whatever it says at the bottom of the screen for instructions to boot. Ideally it will show the boot progress and hand-off to a tty login. – Joseph Santaniello Nov 4 '16 at 10:53
  • if I remove "quiet splash" and add "3" my ubuntu machine doesn't reboot. What if I'd use instead nouveau.modeset=0 and gfxmode text this would be pretty much same thing, right? Btw, how about $vt_handoff? Should I remove that too? End of the Linux line in GRUB look like this: ro quiet splash $vt_handoff by default – Cecily Miller Nov 4 '16 at 11:10

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