Just my 5 cents: I encountered this problem after adding a new command line in my .profile file (qnap qsync launcher). For any reason, this action triggered the black screen problem.
Hello there I am having the exact same problem. I tried to do dynamic scaling using xrandr and I am using proprietary NVIDIA drivers I have GTX 1650. Whenever I login it basically opens a black screen and that’s the end. Can you please tell me the step step procedure to undo the hyper resolution effect ?
Okay I did some workaround myself and my solution is mentioned nowhere here so I’ll just post it for someone having this exact problem.
- When you reach your login screen with your username press Alt+F2 or Alt+F5
- You will come inside command line, login with your username and password
- It will ask for your sudo password once more so type in your password one more time
- Type “edit ~/.profile”
- This is the place where you should have added the scaling commands, so that your machine remembers them every time while u reboot. Go and search those line they will be usually in the last begining with “xrandr” and containing your custom resolution so it won’t be hard to find them
- Delete everything that has xrandr or any resolution in it since this file isn’t supposed to contain anything like that.
- Type “:w”
- Type “:q”
- Type “sudo reboot”
You should login to your usual desktop now if you login. Hope this works!!
If I have this problem with Ubuntu-MATE, is it the same command to reinstall? I have an SD card on a Raspberry Pi that won’t boot up also. I get to the command line, but that’s about all…
Sorry - but I should point out - you should not use sudo** to edit any files in “~” - i.e. your home folder - the only time you will need sudo for this process is “sudo reboot”… Also a very quick “vi/vim” shortcut for “:w” and “:q” is “ZZ” (shift+zz).
Note also - in Ubuntuland - the virtual TTY’s are Alt+F3, F4, F5, F6 (and also - F7 - yeah - I know a lot of howto’s claim the GUI is at F7 - but it’s not in Ubuntu Gnome - since around Ubuntu 17.10 or so) - Alt+F2 is your running GUI, and Alt+F1 is your DM (e.g. LightDM or GDM in Ubuntu with gnome - i.e. GUI login).
** using sudo might make that edited file readable only by “root” - you don’t want that… Note : I’ve NEVER been prompted for my sudo password when logging into any Virtual TTY console…
edit :
also - I’d recommend “sudo sync” just before you “sudo reboot”… I always run “sync” before rebooting any NIX server or appliance…
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At the login screen, bring up the terminal using one of the key combinations mentioned in this thread (ctrl+alt+f2 worked for me). Login via the terminal and install the nvidia driver version 4.5.0:
sudo apt install nvidia-driver-450
Reboot your machine and login via the GUI. The screen may go blank for a while but it should come back up soon after.
For me this happened because the disk was full (login into the shell with Ctrl-Alt-F5 and writing df -H showed 0% free on the / mount point). Clearing some space with sudo apt-get clean fixed the issue.
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