You have been subscribed to a public bug:
https://gitlab.freedesktop.org/upower/upower/issues/73
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On laptops with two separate (down,up) keys to control the backlit
keyboard, both keys seem to do nothing. The OSD for the backlit keyboard
is displayed but no progress bar and no actual effect to the backlight.
Almost as if the shell only understands laptops with a single key for
controlling the keyboard backlight...
Bug verified in cosmic on:
* Asus UX331UAL
* Apple Macbook Pro 12,1
* Apple Macbook Air
All of them have these keys and they all fail in the same way. However
it is not a kernel bug. The kernel interface
(/sys/class/leds/*::kbd_backlight/*) works when I write to it directly.
This seems to be a problem with Gnome Shell only.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: gnome-shell 3.30.0-3ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-8.9-generic 4.18.7
Uname: Linux 4.18.0-8-generic x86_64
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 7 13:41:50 2018
DisplayManager: gdm3
InstallationDate: Installed on 2018-09-11 (25 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Alpha amd64 (20180822)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: gnome-settings-daemon (Ubuntu)
Importance: Undecided
Status: New
** Affects: upower (Ubuntu)
Importance: Medium
Status: Triaged
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Invalid
** Tags: amd64 apport-bug cosmic wayland-session
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Keyboard brightness control keys (down/up) don't work
https://bugs.launchpad.net/bugs/1796550
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