*** This bug is a duplicate of bug 1869750 ***
    https://bugs.launchpad.net/bugs/1869750

I'm having a similar issue on Ubuntu 20.04. Currently, every time that I
reboot I'm unable to login. I just get a black screen after logging in.
I have noticed that if I first delete the contents of .config and .local
I'm able to log in. However, obviously, all of my configurations and
customizations are then gone. My workaround lately has been to clear
those directories, login, logout, copy a backup of those directories to
the active directories and then log back in. It's a pain, but for some
reason it works. Otherwise, 100% of the time after a reboot I can't
access the desktop.

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to nvidia-graphics-drivers-440 in Ubuntu.
https://bugs.launchpad.net/bugs/1870779

Title:
  [nvidia] Ubuntu 20.04 beta: Blank/black screen after login on an
  Nvidia-only desktop (GeForce GTX 1060)

Status in nvidia-graphics-drivers-440 package in Ubuntu:
  Confirmed
Status in xorg-server package in Ubuntu:
  Confirmed

Bug description:
  I have the reproducible effect with Ubuntu 20.04 beta that I'm able to login 
right after installation, but after a few reboots a black screen is displayed 
after login.
  I'm able to switch to a tty and tried to collect information with ubuntu-bug, 
but I am not sure if that help. I'm happy to provide further information if 
needed.
  I reinstalled Ubuntu 20.04 a couple of times, the behaviour is always the 
same. 19.10 works without any problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  .proc.driver.nvidia.gpus.0000.09.00.0: Error: [Errno 21] Is a directory: 
'/proc/driver/nvidia/gpus/0000:09:00.0'
  .proc.driver.nvidia.registry: Binary: ""
  .proc.driver.nvidia.suspend: suspend hibernate resume
  .proc.driver.nvidia.suspend_depth: default modeset uvm
  .proc.driver.nvidia.version:
   NVRM version: NVIDIA UNIX x86_64 Kernel Module  440.64  Fri Feb 21 01:17:26 
UTC 2020
   GCC version:  gcc version 9.3.0 (Ubuntu 9.3.0-8ubuntu1)
  ApportVersion: 2.20.11-0ubuntu22
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  Date: Sat Apr  4 14:05:01 2020
  DistUpgraded: Fresh install
  DistroCodename: focal
  DistroVariant: ubuntu
  DkmsStatus:
   nvidia, 440.64, 5.4.0-21-generic, x86_64: installed
   virtualbox, 6.1.4, 5.4.0-21-generic, x86_64: installed
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   NVIDIA Corporation GP106 [GeForce GTX 1060 6GB] [10de:1c03] (rev a1) 
(prog-if 00 [VGA controller])
     Subsystem: Dell GP106 [GeForce GTX 1060 6GB] [1028:11d7]
  InstallationDate: Installed on 2020-04-03 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
  MachineType: Dell Inc. Inspiron 5675
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-21-generic 
root=UUID=3210a7fb-4a4d-4b22-ba85-60282726ebc3 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  Title: Xorg crash
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/14/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.3.7
  dmi.board.name: 0477DV
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 1.3.7
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.3.7:bd03/14/2018:svnDellInc.:pnInspiron5675:pvr1.3.7:rvnDellInc.:rn0477DV:rvrA00:cvnDellInc.:ct3:cvr1.3.7:
  dmi.product.family: Inspiron
  dmi.product.name: Inspiron 5675
  dmi.product.sku: 07EE
  dmi.product.version: 1.3.7
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.100-4
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.2-1ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.nvidia-graphics-drivers: nvidia-graphics-drivers-* N/A
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20190815-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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