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I'm using Ubuntu 15.04 and upgraded to 15.10 tonight. After restarting I'm getting a black screen with a flickering message from my window manager.

First I was able to get into tty1, so I reinstalled some drivers (I'm using Intel and nvidia with prime, although since the update I can't even switch to nvidia anymore), the gnome desktop, lightdm and xserver. Nothing helped and I still only got a black screen or the low graphics mode warning.

Then I added the xorg-edgers after reading an answer here, which screwed me over completely: now I can't even open the terminal because lightdm keeps restarting! I can't get into the grub menu either for some reason although I'm holding down shift while booting.

Edit: Maybe I explained my problem poorly. When the system boots I get a black screen and the same message (either "fsck from util-linux 2.26.2" or "started light display manager") over and over again while the screen " restarts ". I can't get into the grub menu by holding shift during boot and I can't even get into tty1 with alt ctrl f1, because I always get thrown out of it by said message. So right now I can do literally nothing because I don't even get the opportunity to run any commands

I don't see how the suggested related question has anything to do with mine whatsoever

Max
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1 Answers1

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Completely reinstall the NVIDIA drivers! I assume that you have a GPU newer than GEFORCE 400.

When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0 parameter to the end of the linux line ... Then press F10 to boot.

When the login screen appears press Ctrl+Alt+F1.

Enter your user name and password. Now uninstall every NVIDIA related software by executing: 

sudo apt-get install ppa-purge
sudo ppa-purge ppa:xorg-edgers/ppa
sudo apt-get update
sudo apt-get purge nvidia*  
sudo reboot

When the GRUB boot menu appears : Highlight the Ubuntu menu entry and press the E key.
Add the nouveau.modeset=0 parameter to the end of the linux line ... Then press F10 to boot.

When the login screen appears press Ctrl+Alt+F1.

Enter your user name and password. Now reinstall the NVIDIA drivers by executing: 

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update
sudo apt-get install nvidia-355 nvidia-prime
sudo reboot

Note:

As you did not provide any information about your NVIDIA graphics card check drivers versions.
Replace 355 with the latest stable main version number supporting your NVIDIA GEFORCE GPU.
If you ever have had bumblebee installed before to switch between graphics - also remove this.

cl-netbox
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    @edwardtorvalds : Maybe you can call it a duplicate, but then all answers and question questions regarding this topic are duplicates - important is : This answers addresses the problem ! :) – cl-netbox Nov 18 '15 at 08:54
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    @edwardtorvalds : Shall we now mark everything as duplicate, or isn't it betterand more helpful for a (new) user to just answer the question ? – cl-netbox Nov 18 '15 at 08:58
  • marking duplicate also helps (new) user. after all they want answer and your previous answers are exactly the same as this – Alex Jones Nov 18 '15 at 09:00
  • please take a look at this: http://meta.askubuntu.com/a/14692/294611 – Alex Jones Nov 18 '15 at 11:38
  • Maybe I explained my problem poorly. When the system boots I get a black screen and the same message (either "fsck from util-linux 2.26.2" or "started light display manager") over and over again while the screen " restarts ". I can't get into the grub menu by holding shift during boot and I can't even get into tty1 with alt shift f1, because I always get thrown out of it by said message. So right now I can do literally nothing because I don't even get the opportunity to run any commands – Max Nov 18 '15 at 12:42
  • @Max : Maybe something went completely wrong while performing the upgrade (think of kernel upgrade to version 4.2) ... I suggest that you perform a complete new (clean) fresh install of Ubuntu 15.10 and after this install the NVIDIA drivers following the instructions given in the answer. As it is a clean install you can skip part 1 (removal) and start with part 2 (install) - I recommend to reformat the ubuntu system partition with ext4 using GParted before - the tool is included in the ubuntu install media. :) – cl-netbox Nov 18 '15 at 14:11
  • @cl-netbox : That's what I ended up having to do. Of course it's very disappointing that I can't even do a simple OS upgrade on Ubuntu without the risk of completely destroying my system but oh well... Anyway, thank you for the help. – Max Nov 19 '15 at 14:24