Changing backlight doesn't work in Gnome
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Medium
|
Unassigned |
Bug Description
With Unity I can change the backlight with the hotkeys out of the box, didn't had to do anything to get that working.
I've now switched to Gnome (by installing ubuntu-
I've tried everything on this page: https:/
I've tried different combinations in my grub configuration:
video.use_
acpi_backlight=
acpi_backlight=none
thinkpad-
thinkpad-
acpi_osi="!Windows 2012"
acpi_osi=linux
thinkpad-
I've also added 'EnableBrightne
Unfortunately, nothing changes.
And /sys/class/
The only thing that did make a difference was adding 'acpi_os=' to my grub config.
This did show the backlight slider in the settings & menu. And did show the pop-up when changing the backlight via the hotkeys.
Unfortunately, it didn't change the backlight. And the slider didn't go futher than 5% or something.
During all my tests xbacklight always worked. That's the only way to change my backlight in Gnome atm. Only when I added 'acpi_os=' xbacklight stopped working.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-
ProcVersionSign
Uname: Linux 4.4.0-36-generic x86_64
NonfreeKernelMo
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: GNOME
Date: Fri Sep 16 08:55:30 2016
EcryptfsInUse: Yes
HibernationDevice: RESUME=
InstallationDate: Installed on 2016-08-30 (17 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 20ENCTO1WW
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.157.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/03/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1EET57W (1.30 )
dmi.board.
dmi.board.name: 20ENCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.
dmi.modalias: dmi:bvnLENOVO:
dmi.product.name: 20ENCTO1WW
dmi.product.
dmi.sys.vendor: LENOVO
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