Public bug reported:

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

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug crash focal ubuntu

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Title:
  Ubuntu 20.04 beta: Blank/black screen after login

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