Public bug reported:

If I choose nvidia driver, then the screen is black and I cannot log in. To log 
in, I need to delete all nvidia files.
After that, the xorg is selected and I can log in. But I cannot edit 
brightness. I can hardly see anything on the screen. The battery is draining 
very badly.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: xorg 1:7.7+22ubuntu1
ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21
Uname: Linux 5.11.0-22-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon Jul  5 10:54:41 2021
DistUpgraded: Fresh install
DistroCodename: hirsute
DistroVariant: ubuntu
DkmsStatus: nvidia, 460.80, 5.11.0-22-generic, x86_64: installed
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630] [8086:3e9b] (rev 02) 
(prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company UHD Graphics 630 (Mobile) [103c:85fb]
 NVIDIA Corporation TU116M [GeForce GTX 1660 Ti Mobile] [10de:2191] (rev a1) 
(prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company TU116M [GeForce GTX 1660 Ti Mobile] 
[103c:85fb]
InstallationDate: Installed on 2021-06-25 (9 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
MachineType: HP HP Pavilion Gaming Laptop 15-dk0xxx
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-22-generic 
root=UUID=a7c41e63-e7ea-43e0-9de0-55322f489ee5 ro recovery nomodeset 
dis_ucode_ldr
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/16/2020
dmi.bios.release: 15.33
dmi.bios.vendor: Insyde
dmi.bios.version: F.33
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 85FB
dmi.board.vendor: HP
dmi.board.version: 42.42
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: HP
dmi.chassis.version: Chassis Version
dmi.ec.firmware.release: 42.42
dmi.modalias: 
dmi:bvnInsyde:bvrF.33:bd07/16/2020:br15.33:efr42.42:svnHP:pnHPPavilionGamingLaptop15-dk0xxx:pvrType1ProductConfigId:rvnHP:rn85FB:rvr42.42:cvnHP:ct10:cvrChassisVersion:
dmi.product.family: 103C_5335KV HP Pavilion
dmi.product.name: HP Pavilion Gaming Laptop 15-dk0xxx
dmi.product.sku: 2C7M8EA#ACB
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.104-1build1
version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.1-2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.11-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200714-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-1

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


** Tags: amd64 apport-bug hirsute ubuntu

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https://bugs.launchpad.net/bugs/1934647

Title:
  Nvidia driver black screen at login.

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