Mark INVALID per #5.

** Changed in: linux (Ubuntu)
       Status: Confirmed => Invalid

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  Unable to set brightness on Dell G3 3579 with nomodeset

Status in linux package in Ubuntu:

Bug description:
  I have Dell inspiron G3.
  I am not able to change the screen brightness. I tried many solutions, but 
none worked.

  1. I tried changing acpi_backlight = vendor:
  Now this does solve but it creates another problem. Because for my laptop to 
shutdown and start properly the LINUX_GRUB_DEFAULT must be set to nomodeset.

  2. I tried installing applications:
  But when I run these applications it show "No backlights were found on the 

  Kindly address the issue and provide a solution. It is causing great

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-46-generic 4.15.0-46.49
  ProcVersionSignature: Ubuntu 4.15.0-46.49-generic 4.15.18
  Uname: Linux 4.15.0-46-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: amd64
   /dev/snd/controlC0:  rishita    1806 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Apr 12 11:55:50 2019
  HibernationDevice: RESUME=UUID=b45c9211-82df-4eb1-88ef-95ba16bfe090
  InstallationDate: Installed on 2019-02-28 (42 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
  MachineType: Dell Inc. G3 3579
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-46-generic 
root=UUID=4aaeabb9-cce5-41e4-8dfd-2a30aaf8d649 ro quiet splash nomodeset 
acpi_backlight=vendor vt.handoff=1
   linux-restricted-modules-4.15.0-46-generic N/A
   linux-backports-modules-4.15.0-46-generic  N/A
   linux-firmware                             1.173.3
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install) 05/25/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.1.0 05K0D2
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
dmi:bvnDellInc.:bvr1.1.0:bd05/25/2018:svnDellInc.:pnG33579:pvr:rvnDellInc.:rn05K0D2:rvrA00:cvnDellInc.:ct10:cvr: GSeries G3 3579
  dmi.sys.vendor: Dell Inc.

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