Public bug reported:
As with all the proceeding distros from ubuntu 16.10 the brightness of the OLED
screen canot be set. Since xrander is no more present there is also no hack
around this problem anymore. This bug is a killer for using the system as full
brightness drains the battery quickly.
OLED screens have no backlight, thus this might be the issue.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-20-generic 4.15.0-20.21
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue May 1 10:45:56 2018
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: linux-signed (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/1768208
Title:
OLED X1 yoga lenove, screen ubuntu, brightness issue
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