I believe that is due to the machine missing an Nvidia driver AND
running an older kernel that may not support the current GPU. Although
if you have successfully updated the kernel already then it should be
6.8 which is new enough.

To avoid reinstalling (a newer) Ubuntu, you can try accessing the grub
boot menu by tapping Escape before the OS loads. Once in the menu you
will be able to select a safe/recovery mode. If you can get that to boot
then please run:

  journalctl -b-1 > prevboot1.txt
  journalctl -b-2 > prevboot2.txt

and attach the resulting text files here. Otherwise please install
Ubuntu 24.04.1 LTS instead.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-hwe-6.2 in Ubuntu.
https://bugs.launchpad.net/bugs/2078814

Title:
  [Lenovo LOQ 15ARP9] I cannot change or control backlight brightness

Status in linux-hwe-6.2 package in Ubuntu:
  Won't Fix

Bug description:
  My laptop is brand new and when i installed it first i could see the
  option to control brightness near to the sound control option.The
  option(sound bar option)was useless because my displays brightness
  wasnt changing.Now i cannot even see the option itself.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: xorg (not installed)
  ProcVersionSignature: Ubuntu 6.2.0-26.26~22.04.1-generic 6.2.13
  Uname: Linux 6.2.0-26-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.6
  Architecture: amd64
  BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
  CasperMD5CheckResult: unknown
  CompositorRunning: None
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Sep  3 18:39:10 2024
  DistUpgraded: Fresh install
  DistroCodename: jammy
  DistroVariant: ubuntu
  ExtraDebuggingInterest: No
  GraphicsCard:
   NVIDIA Corporation Device [10de:28e0] (rev a1) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:3e3c]
  MachineType: LENOVO 83JC
  ProcEnviron:
   LANGUAGE=en_IN:en
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_IN
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.2.0-26-generic 
root=UUID=846d43bf-9cc2-46e6-abe8-1aebc689baa7 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/04/2024
  dmi.bios.release: 1.6
  dmi.bios.vendor: LENOVO
  dmi.bios.version: PQCN06WW
  dmi.board.asset.tag: NO Asset Tag
  dmi.board.name: LNVNB161216
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0T76485 WIN
  dmi.chassis.asset.tag: NO Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: LOQ 15ARP9
  dmi.ec.firmware.release: 1.6
  dmi.modalias: 
dmi:bvnLENOVO:bvrPQCN06WW:bd03/04/2024:br1.6:efr1.6:svnLENOVO:pn83JC:pvrLOQ15ARP9:rvnLENOVO:rnLNVNB161216:rvrSDK0T76485WIN:cvnLENOVO:ct10:cvrLOQ15ARP9:skuLENOVO_MT_83JC_BU_idea_FM_LOQ15ARP9:
  dmi.product.family: LOQ 15ARP9
  dmi.product.name: 83JC
  dmi.product.sku: LENOVO_MT_83JC_BU_idea_FM_LOQ 15ARP9
  dmi.product.version: LOQ 15ARP9
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.113-2~ubuntu0.22.04.1
  version.libgl1-mesa-dri: libgl1-mesa-dri 23.2.1-1ubuntu3.1~22.04.2
  version.libgl1-mesa-glx: libgl1-mesa-glx N/A
  version.xserver-xorg-core: xserver-xorg-core 2:21.1.4-2ubuntu1.7~22.04.11
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2ubuntu1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20210115-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 
1:1.0.17-2build1

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