Arch Linux

venky80

Member

Registered: 2007-05-13

Posts: 1,002

laptop-mode / laptop-mode-tools lcd brightness issue

I have an issue with my lcd brightness config in laptop-mode tools
here is the brightness values

[venky@ARCHROCKS ~]$  cat /proc/acpi/video/VID/LCD/brightness
levels:  72 24 12 24 36 48 60 72 84 100
current: 72
[venky@ARCHROCKS ~]$

following is my lcd-bightness.conf file under /etc/laptop-mode/conf.d

#
# Configuration file for Laptop Mode Tools module lcd-brightness.
#
# For more information, consult the laptop-mode.conf(8) manual page.
#


###############################################################################
# LCD brightness settings
# -----------------------
#
# Using these settings, you can make laptop mode tools automatically adjust
# your LCD's brightness settings. The settings are extremely simple -- they
# only allow for the execution of a command, nothing more. The reason for this
# is that LCD brightness settings are very different between laptop vendors.
#
# Suggestions for commands:
#
#  * If your system has the file "/proc/acpi/video/VID/LCD/brightness" (VID may
#    be VID1 or similar), use this file as BRIGHTNESS_OUTPUT, and use
#    the command "echo <value>". The possible values can be listed using the
#    command:
#
#       cat /proc/acpi/video/VID/LCD/brightness
#
#  * If you have a file /sys/class/backlight/.../brightness, then you can use
#    that file as BRIGHTNESS_OUTPUT, and the command "echo <value>".
#
#    As far as I understand it the values are between 0 and
#    the value contained in the file /sys/class/backlight/.../max_brightness.
#
#  * For Toshiba laptops, use the command "toshset" with the -lcd or -inten
#    command. Read the toshset(1) manual page for more information on the
#    parameters for this command. If you use this command, set
#    BRIGHTNESS_OUTPUT to "/dev/null".
#
###############################################################################

###############################################################################
#
# IMPORTANT: In versions 1.36 and earlier, these settings were included in the
# main laptop-mode.conf configuration file. If they are still present, they
# overrule the settings in this file. To fix this, simply delete the settings
# from the main config file.
#
###############################################################################


#
# Should laptop mode tools control LCD brightness?
#
CONTROL_BRIGHTNESS=1


#
# Commands to execute to set the brightness on your LCD
#
BATT_BRIGHTNESS_COMMAND="echo 24"
LM_AC_BRIGHTNESS_COMMAND="echo 100"
NOLM_AC_BRIGHTNESS_COMMAND="echo 72"
BRIGHTNESS_OUTPUT="/proc/acpi/video/VID/LCD/brightness"

so basically while in AC power i want full brightness when on battery i want one notch more than the minimum brightness and when laptop-mode is not running i want 2 notches less than maximum brightness.
the battery mode works fine when i unplug the computer but when i replug the AC power it goes to 72 instead of 100. I mean laptop mode is running coz when I remove ac power it goes to 24 again.
Am I doing something wrong?

---

Acer Aspire V5-573P Antergos KDE

Voronwe

Member

From: Poland, Poznan/Wroclaw

Registered: 2008-09-03

Posts: 6

Website

Re: laptop-mode / laptop-mode-tools lcd brightness issue

When you plug in AC power, laptop-mode probably turns down, so LCD brightness is set to 72. It depends on if you have set in /etc/laptop-mode/laptop-mode.conf ENABLE_LAPTOP_MODE_ON_AC to 0 or 1.