This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1714316
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1714316
Title:
can't change backlight and /sys/class/backlight empty
Status in linux package in Ubuntu:
Incomplete
Bug description:
I first changed the backlight by hotkey and writing
/sys/class/backlight/brightness file. But the actual brightness wasn't
changed.
I reboot my laptop and can't found any files in /sys/class/backlight/,
and control bar of brightness disappear.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.10.0-33-generic 4.10.0-33.37~16.04.1
ProcVersionSignature: Ubuntu 4.10.0-33.37~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-33-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Sep 1 01:30:43 2017
InstallationDate: Installed on 2017-08-31 (0 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)
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