Public bug reported:
Changed the grub to acpi_backlight=vendor was not working. No file
showed under ls /sys/class/backlight
Laptop Dell inspiron-3593
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-5.0.0-29-generic 5.0.0-29.31~18.04.1
ProcVersionSignature: Ubuntu 5.0.0-29.31~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 4 00:21:51 2019
InstallationDate: Installed on 2019-10-03 (1 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
SourcePackage: linux-signed-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed-hwe (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1846676
Title:
screen brightness cannot be adjusted
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