Nvidia graphics fail to start on 20.04

[Alan Griffiths]

System is a Slimbook ProX15.

Nvidia graphics work with 18.04/435, but with 20.04 the system doesn't come up (tried both 440 and 435).

It looks as though the Nvidia card is active, but there are no outputs attached to it.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: nvidia-driver-440 440.64-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-14.17-generic 5.4.18
Uname: Linux 5.4.0-14-generic x86_64
ApportVersion: 2.20.11-0ubuntu20
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Mar 13 15:12:56 2020
InstallationDate: Installed on 2020-02-18 (24 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200218)
SourcePackage: nvidia-graphics-drivers-440
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Peter de Kraker (peterdekraker)]

Since updating from a 20.04 version a month ago, to the one that is now current, I can't boot anymore. When booting, the splashscreen is shown shortly, before turning to black, and my monitor shows 'no input'. When removing nvidia-driver-440 and rebooting, I can boot into Ubuntu without issues.

I have a GTX 1070, AMD 3600 CPU, 32GB ECC Ram.

Reinstalling nvidia-driver-440 immediately causes failure to boot.

[Peter de Kraker (peterdekraker)]

Ok, I tried a fresh install of the just released Ubuntu 20.04 beta. I formatted everything, installed through the desktop GUI with option to install nvidia drivers immediately. All went well, rebooting, same issue.(!) Only shows purple screen with user login, that does not do anything. This is a vanilla install, immediately fails.

Pressing CTRL F7 shows me sometimes the loaded desktop, while at the same time showing some command line messages. I can't do anything and it doesnt update when moving mouse or so.

So yeah, I think this is a timing issue or so? I have quite a beefed up system. Still, this seems a major bug for a beta release (!)