Dear Sirs!
I am completely newbie in Linux and in Linux Mint in particular. In my
case adding Option "RegistryDwords" "EnableBrightnessControl=1" clause
in xorg.conf did not change anything in brightness.
uname -a
Linux Dell-XPS-L702X 4.10.0-38-generic #42~16.04.1-Ubuntu SMP Tue Oct 10
16:32:20 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Xorg.conf
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 387.22 (buildd@lgw01-amd64-017) Tue Oct 31
00:34:18 UTC 2017
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "LGD"
HorizSync 67.0 - 137.0
VertRefresh 60.0 - 119.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce GT 555M"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "DFP-2"
Option "metamodes" "DP-1: 1920x1080_120 +0+0, DP-2:
nvidia-auto-select +1920+0"
Option "SLI" "Off"
Option "MultiGPU" "Off"
Option "BaseMosaic" "off"
Option "RegistryDwords" "EnableBrightnessControl=1"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Please, be so kind, help me in solving that issue. I could not imagine before
that impossibility to change display brightness may drive someone crazy.
By the way, I performed all steps concerned brightness described at the
following topic. To my regret I got no results.
https://sites.google.com/site/easylinuxtipsproject/display#TOC-
Brightness-of-the-display-is-wrong-and-not-adjustable
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-power-manager in Ubuntu.
https://bugs.launchpad.net/bugs/762670
Title:
Laptop brightness on Dell XPS not controllable
Status in gnome-power-manager package in Ubuntu:
Confirmed
Bug description:
ERROR: Method "GetBrightness" with signature "" on interface
"org.freedesktop.UPower.KbdBacklight" doesn't exist
The brightness of my laptop's screen is not changed at all when using the
Fn-Keys.
Ubuntu displays the notification area with the brightness setting displayed,
it even shows that the brightness value is changed - but the actual brightness
of the screen remains the same at all times!
Laptop: Dell XPS 17, Full-HD 3D display, Nvidea graphics.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/762670/+subscriptions
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