This patch is already in Eoan, mark this one as Fix-released.
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: In Progress
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Eoan)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1837117
Title:
Laptop backlight is off after system boot up
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Xenial:
In Progress
Status in linux source package in Disco:
New
Status in linux source package in Eoan:
Fix Released
Bug description:
After kernel update the backlight on my Asus eeepc 1005px becomes off
during boot up. I can see the login screen if I point light to the
screen. The backlight is not reacting on brightness adjustment keys.
The backlight starts working only if I close and open the laptop lid.
I have tried to:
* echo 10 > /sys/class/backlight/acpi_video0/brightness
* echo 125 > /sys/class/backlight/intel_backlight/brightness
* vbetool dpms on
* pass "acpi_backlight=vendor" kernel parameter
* install gdm instead of lightdm
* create /usr/share/X11/xorg.conf.d/80-backlight.conf with content
recommended in Kernel/Debugging/Backlight Wiki article
with no luck.
The backlight works fine if I pass "acpi_osi=" kernel parameter, the
brightness is adjusted by keys, but the applet does not react to
adjustments.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-145-generic 4.4.0-145.171
ProcVersionSignature: Ubuntu 4.4.0-145.171-generic 4.4.176
Uname: Linux 4.4.0-145-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Jul 18 22:30:44 2019
InstallationDate: Installed on 2019-02-17 (151 days ago)
InstallationMedia: Xubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64
(20160719)
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)
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