2

I have installed the latest ubuntu 20.04 and recently noticed a bug that whenever I close my lid the screen only goes blank instead of going into hibernate or suspend. Earlier after reopening the lid, I was presented with a lock screen.

  • I noticed that there is no longer an option in gnome-settings as it was in ubuntu 18.04.
  • tried changing the values in /etc/systemd/logind.conf.
  • changing values in gnome-tweaks.

  • tried installing hibernate from sudo apt-get install hibernate and running

    sudo hibernate

    getting this error

    hibernate:Warning: Tuxonice binary signature file not found. Some modules failed to unload: nvidia_drm nvidia_modeset nvidia hibernate: Aborting suspend due to errors in ModulesUnloadBlacklist (use --force to override)

How to resolve this?

Sandeep Singh
  • 41
  • 4

1 Answers1

-1

Yes, changing the display manager to GDM3 worked for me as well. It was as simple as:

sudo apt-get install gdm3

During the install process a screen pops up that allows you to choose GDM3 instead of LightDM. Choose GDM3!

Before that though, I made several failed attempts to install other display managers such as SLIM, CDM, XDM, etc. I spent hours trying to "compile" and "make" (a bit over my head) and they were all dead ends.

hoatzin
  • 568
  • When I had LightDM on my 20.04 system, when I would shut the lid it kept running (didn't suspend like it should). When I opened the lid all I got was a permanent blank screen that required a hard shutdown. – hoatzin Sep 12 '20 at 05:17
  • gdm3 is not compatible with nvidia. Only lightdm works see this thread https://askubuntu.com/questions/908764/display-manager-gdm3-not-working-under-ubuntu-17-04 – Melchia Oct 14 '20 at 16:43