Public bug reported:

Test case;
An optimus laptop
fresh 19.10 install, updated.
Install nvidia-driver-430
Enable nvidia-drm.modeset ( done here thru a .conf /etc/modprobe.d
Reboot

What happens:
Boots to login screen, all attempts to log into a ubuntu session loop back to 
log in screen

Attached log from journalctl

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: gdm3 3.32.0-1ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-17.18-generic 5.0.8
Uname: Linux 5.0.0-17-generic x86_64
ApportVersion: 2.20.11-0ubuntu3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Jun 22 21:13:04 2019
InstallationDate: Installed on 2019-06-22 (0 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190606)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.gdm3.custom.conf: [modified]
mtime.conffile..etc.gdm3.custom.conf: 2019-06-22T20:52:09.277952

** Affects: gdm3 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug eoan nvidia-drm.modeset

** Attachment added: "journalctl on attempted login"
   https://bugs.launchpad.net/bugs/1833832/+attachment/5272427/+files/1.log

** Summary changed:

- NVIDIA kernel module fails with KMs on optimus hardware
+ NVIDIA kernel module fails with KMS on optimus hardware

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gdm3 in Ubuntu.
https://bugs.launchpad.net/bugs/1833832

Title:
  NVIDIA kernel module fails with KMS on optimus hardware

Status in gdm3 package in Ubuntu:
  New

Bug description:
  Test case;
  An optimus laptop
  fresh 19.10 install, updated.
  Install nvidia-driver-430
  Enable nvidia-drm.modeset ( done here thru a .conf /etc/modprobe.d
  Reboot

  What happens:
  Boots to login screen, all attempts to log into a ubuntu session loop back to 
log in screen

  Attached log from journalctl

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: gdm3 3.32.0-1ubuntu1
  ProcVersionSignature: Ubuntu 5.0.0-17.18-generic 5.0.8
  Uname: Linux 5.0.0-17-generic x86_64
  ApportVersion: 2.20.11-0ubuntu3
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Jun 22 21:13:04 2019
  InstallationDate: Installed on 2019-06-22 (0 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190606)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: gdm3
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.gdm3.custom.conf: [modified]
  mtime.conffile..etc.gdm3.custom.conf: 2019-06-22T20:52:09.277952

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