Public bug reported:
I have followed the instructions at
https://wiki.ubuntu.com/Kernel/Debugging/Backlight
The backlight control only works when I try the workaround by passing
ONLY the kernel parameter "acpi_osi=" by editing the kernel boot at
startup (by pressing the shift key). However, when I try adding this
parameter permanently to the grub file, it doesn't work anymore. Any
idea how to fix this?
Thank you in advance.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.8.0-46-generic 4.8.0-46.49~16.04.1
ProcVersionSignature: Ubuntu 4.8.0-46.49~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-46-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Apr 8 20:47:09 2017
InstallationDate: Installed on 2017-04-06 (2 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64
(20170215.2)
SourcePackage: linux-hwe
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-hwe (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
** Attachment added: "All required command outputs are included in the tar file"
https://bugs.launchpad.net/bugs/1681078/+attachment/4858153/+files/backlight.tar.gz
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https://bugs.launchpad.net/bugs/1681078
Title:
backlight control not working
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