La luminosité ne fonctionne pas après l'installation du pilote NVIDIA

Les autres réponses sont de bonnes étapes à essayer, mais notez que certaines combinaisons de noyau Ubuntu / Linux et du pilote Nvidia ne fonctionnent tout simplement pas. J'ai utilisé 12.04 pendant des années, et même si j'ai essayé toutes les réponses ci-dessus, je ne pouvais obtenir aucun des pilotes Nvidia de prendre en charge l'atténuation de l'écran sur mon Macbook Pro 5,5.

Lorsque je suis finalement passé à la version 14.04, j’ai essayé le pilote Nouveau, qui prenait en charge la gradation de l’écran et qui était généralement plus rapide et plus fiable, ainsi que Nvidia. Malheureusement, il ne prend pas en charge la suspension / reprise, ce qui le rend inutile sur un ordinateur portable. Je suis revenu sur Nvidia, mais plusieurs pilotes ont provoqué un crash de X / lightdm, m'empêchant même de me connecter. J'ai finalement constaté que le pilote Nvidia 340 était stable avec mon Macbook Pro 5,5 et Ubuntu 14.04 et prenait également en charge la gradation.

Pour info, je viens de travailler sur cela sur un Lenovo W520, et l'ajout de la simple ligne Option "RegistryDwords" "EnableBrightnessControl = 1"

sur xorg.conf suffisait - aucun autre bogosity n’était nécessaire, et tout fonctionnait parfaitement avec une version actuelle de NVidia (plus précisément, fonctionnant sous 346.35)

NVIDIA brightness bash script

Le script Perl ci-dessus ne fonctionnant pas pour moi, j’ai donc écrit mon propre script en tant que script bash (car je ne connais pas perl). Cela a pris un peu de temps, mais le fichier de paramètres est créé par lui-même et peut être utilisé avec des options de ligne de commande pour ajuster la luminosité ou le gamma ou les deux en même temps. Je l'utilise avec les commutateurs --brightness-up et --brightness-down pour les touches de luminosité de mon clavier. Assignation facile dans XFCE4 et sûrement aussi dans KDE / GNOME.

nvidia-brightness.sh:

#!/bin/sh

# Tested only with nvidia-settings-319.12 and nvidia-drivers-319.17 on Funtoo Linux running XFCE 4.10
#
# Requirements:
# - NVIDIA Drivers (e.g. nvidia-current in Ubuntu)
# - NVIDIA Settings (nvidia-settings in Ubuntu)
# - xrandr (used by default to determine the correct display name)
#
# This script can be used to change the brightness on systems with an NVIDIA graphics card
# that lack the support for changing the brightness (probably needing acpi backlight).
# It uses "nvidia-settings -a" to assign new gamma or brightness values to the display.
#
# "nvidia-brightness.sh" may be run from the command line or can be assigned to the brightness keys on your Keyboard
# e.g. in XFCE4.
#
# Type "nvidia-brightness.sh --help" for valid options.

usage ()
{
cat << ENDMSG
Usage: 
   nvidia-brightness.sh [ options ]
Options:
   [ -gu ] or [ --gamma-up ]         increase gamma by 0.1
   [ -gd ] or [ --gamma-down ]       decrease gamma by 0.1
   [ -bu ] or [ --brightness-up ]    increase brightness by 0.1
   [ -bd ] or [ --brightness-down ]  decrease brightness by 0.1
   [ -i ]  or [ --initialize ]       Must be run once to create the settings file
                                     (~/.nvidia-brightness.cfg).
                                     Brightness settings from ~/.nvidia-settings-rc
                                     will be used if file exists, otherwise 
                                     gamma will be set to 1.0 and brightness to 0.0
                                     (NVIDIA Standard).
   [ -l ]  or [ --load-config ]      Load current settings from ~/.nvidia-brightness.cfg
                                     (e.g. as X11 autostart script)

Examples:
   nvidia-brightness -gd       this will decrease gamma by 0.1
   nvidia-brightness -bu -gd   this will increase brightness by 0.1 and decrease gamma by 0.1
ENDMSG
}

case $1 in 
    -h|--help)
        usage
        exit 0
esac

if [ "$1" != "-i" -a "$1" != "--initialize" ]; then
    if [ ! -f ~/.nvidia-brightness.cfg ]; then 
        echo 'You must run this script with the --initialize option once to create the settings file.'
        echo 'Type "nvidia-brightness.sh --help" for more information.';
        exit 1
    fi
fi

#### INITIALIZE ####
initialize_cfg ()
{
CONNECTED="['xrandr | grep " connected" | awk '{ print $1 }'']"
#CONNECTED="'cat ~/.nvidia-settings-rc  | grep RedBrightness | grep -o "\[.*]"'"
#CONNECTED="[DVI-I-1]"
#CONNECTED="[dpy:2]"
#CONNECTED="0"

if [ -f ~/.nvidia-settings-rc ]; then 
    if [ "'grep RedGamma ~/.nvidia-settings-rc'" != "" ]; then
        if [ "'grep RedBrightness ~/.nvidia-settings-rc'" != "" ]; then
            GAMMA_TEMP='grep RedGamma= ~/.nvidia-settings-rc | sed s/^.*=//'
            BRIGHTNESS_TEMP='grep RedBrightness= ~/.nvidia-settings-rc | sed s/^.*=//'
            NVIDIA_SETTINGS_OK=1
        fi
    fi
fi


[ "$NVIDIA_SETTINGS_OK" != "1" ] && \
GAMMA_TEMP=1.000000 \
BRIGHTNESS_TEMP=0.000000

echo "\
CONNECTED_DISPLAY=$CONNECTED
GAMMA=$GAMMA_TEMP
BRIGHTNESS=$BRIGHTNESS_TEMP" > ~/.nvidia-brightness.cfg

source ~/.nvidia-brightness.cfg

GAMMACOMMA='echo $GAMMA | sed s/"\."/"\,"/'
BRIGHTNESSCOMMA='echo $BRIGHTNESS | sed s/"\."/"\,"/'

nvidia-settings -n -a $CONNECTED_DISPLAY/Gamma=$GAMMACOMMA -a $CONNECTED_DISPLAY/Brightness=$BRIGHTNESSCOMMA 1>/dev/null
}

#### LOAD CONFIGURATION ####
load_cfg ()
{
source ~/.nvidia-brightness.cfg

GAMMACOMMA='echo $GAMMA | sed s/"\."/"\,"/'
BRIGHTNESSCOMMA='echo $BRIGHTNESS | sed s/"\."/"\,"/'

nvidia-settings -n -a $CONNECTED_DISPLAY/Gamma=$GAMMACOMMA -a $CONNECTED_DISPLAY/Brightness=$BRIGHTNESSCOMMA 1>/dev/null
}

#### GAMMA CHANGE ####
gamma_up ()
{
source ~/.nvidia-brightness.cfg

GAMMANEW='echo $GAMMA | awk '{printf "%f", $GAMMA + 0.100000}''

GAMMACOMMA='echo $GAMMANEW | sed s/"\."/"\,"/'

nvidia-settings -n -a $CONNECTED_DISPLAY/Gamma=$GAMMACOMMA  1>/dev/null 

sed -i  s/.*GAMMA=.*/GAMMA=$GAMMANEW/g ~/.nvidia-brightness.cfg
}

gamma_down ()
{
source ~/.nvidia-brightness.cfg

GAMMANEW='echo $GAMMA | awk '{printf "%f", $GAMMA - 0.100000}''

GAMMACOMMA='echo $GAMMANEW | sed s/"\."/"\,"/'

nvidia-settings -n -a $CONNECTED_DISPLAY/Gamma=$GAMMACOMMA  1>/dev/null

sed -i  s/.*GAMMA=.*/GAMMA=$GAMMANEW/g ~/.nvidia-brightness.cfg
}

#### BRIGHTNESS CHANGE ####
brightness_up ()
{
source ~/.nvidia-brightness.cfg

BRIGHTNESSNEW='echo $BRIGHTNESS | awk '{printf "%f", $BRIGHTNESS + 0.100000}''

BRIGHTNESSCOMMA='echo $BRIGHTNESSNEW | sed s/"\."/"\,"/'

nvidia-settings -n -a $CONNECTED_DISPLAY/Brightness=$BRIGHTNESSCOMMA 1>/dev/null

sed -i  s/.*BRIGHTNESS=.*/BRIGHTNESS=$BRIGHTNESSNEW/g ~/.nvidia-brightness.cfg
}

brightness_down ()
{
source ~/.nvidia-brightness.cfg

BRIGHTNESSNEW='echo $BRIGHTNESS | awk '{printf "%f", $BRIGHTNESS - 0.100000}''

BRIGHTNESSCOMMA='echo $BRIGHTNESSNEW | sed s/"\."/"\,"/'

nvidia-settings -n -a $CONNECTED_DISPLAY/Brightness=$BRIGHTNESSCOMMA 1>/dev/null

sed -i  s/.*BRIGHTNESS=.*/BRIGHTNESS=$BRIGHTNESSNEW/g ~/.nvidia-brightness.cfg
}

if [ "$3" != "" ]; then
    usage
    exit 1
fi

error_mixed_gamma ()
{
    echo "Error: [ --gamma-up ] and [ --gamma-down ] can't be used together."
}

error_mixed_brightness ()
{
    echo "Error: [ --brightness-up ] and [ --brightness-down ] can't be used together."
}


if [ "$2" != "" ]; then
    [ "$2" != "-bu" -a "$2" != "--brightness-up" -a "$2" != "-bd" -a "$2" != "--brightness-down" \
    -a "$2" != "-gu" -a "$2" != "--gamma-up" -a "$2" != "-gd" -a "$2" != "--gamma-down" ] && usage && exit 1
fi

case $1 in
    -gu|--gamma-up) 
        [ "$2" == "-gd" ] && error_mixed_gamma && exit 1
        [ "$2" == "--gamma-down" ] && error_mixed_gamma && exit 1
        gamma_up
        ;;
    -gd|--gamma-down) 
        [ "$2" == "-gu" ] && error_mixed_gamma && exit 1
        [ "$2" == "--gamma-up" ] && error_mixed_gamma && exit 1
        gamma_down
        ;;
    -bu|--brightness-up) 
        [ "$2" == "-bd" ] && error_mixed_brightness && exit 1
        [ "$2" == "--brightness-down" ] && error_mixed_brightness && exit 1
        brightness_up
        ;;
    -bd|--brightness-down) 
        [ "$2" == "-bu" ] && error_mixed_brightness && exit 1
        [ "$2" == "--brightness-up" ] && error_mixed_brightness && exit 1
        brightness_down
        ;;
    -h|--help) 
        usage
        exit 0
        ;;
    -i|--initialize)
        if [ "$2" != "" ]; then usage; exit 1; fi   
        initialize_cfg
        exit 0
        ;;
    -l|--load-config)
        if [ "$2" != "" ]; then usage; exit 1; fi   
        load_cfg
        exit 0
        ;;
    *) 
        usage
        exit 1
esac

case $2 in
    -gu|--gamma-up) 
        gamma_up
        ;;
    -gd|--gamma-down) 
        gamma_down
        ;;
    -bu|--brightness-up) 
        brightness_up
        ;;
    -bd|--brightness-down) 
        brightness_down
        ;;
    -h|--help) 
        usage
        exit 0
        ;;
    "")
        ;;
    *) 
        usage
        exit 1
esac

Utilisation:

Enregistrez le fichier quelque part dans votre PATH, par exemple.

/usr/local/bin/nvidia-brightness.sh

N'oubliez pas de

chmod +x /usr/local/bin/nvidia-brightness.sh

Avant de pouvoir l'utiliser, vous devez taper

nvidia-brightness.sh -i

Ceci créera le fichier de paramètres et pourra également être utilisé pour réinitialiser la luminosité à tout moment.

Type

nvidia-settings.sh --help

pour plus d'options:

Usage: 
   nvidia-brightness.sh [ options ]
Options:
   [ -gu ] or [ --gamma-up ]         increase gamma by 0.1
   [ -gd ] or [ --gamma-down ]       decrease gamma by 0.1
   [ -bu ] or [ --brightness-up ]    increase brightness by 0.1
   [ -bd ] or [ --brightness-down ]  decrease brightness by 0.1
   [ -i ]  or [ --initialize ]       Must be run once to create the settings file
                                     (~/.nvidia-brightness.cfg).
                                     Brightness settings from ~/.nvidia-settings-rc
                                     will be used if file exists, otherwise 
                                     gamma will be set to 1.0 and brightness to 0.0
                                     (NVIDIA Standard).
   [ -l ]  or [ --load-config ]      Load current settings from ~/.nvidia-brightness.cfg
                                     (e.g. as X11 autostart script)

Examples:
   nvidia-brightness -gd       this will decrease gamma by 0.1
   nvidia-brightness -bu -gd   this will increase brightness by 0.1 and decrease gamma by 0.1

J'utilise NVIDIA Graphic Card et je rencontre un problème semblable à vous.
Mais j’ai essayé cette chose et c’est un travail:

1. Installez le pilote NVIDIA avec la commande:
sudo apt-add-repository ppa: ubuntu-x-swat / x-updates
sudo apt-get update
sudo apt-get installer nvidia-current
2. Ensuite, redémarrez
3. Fait.

Source: lien

J'ai eu le même problème dans Ubuntu 16.10, après la mise à niveau à partir de 16.04. Dans le fichier xorg.conf (/ usr / share / doc / xserver-xorg-video-intel /), j'ai remplacé le pilote de "intel" par "nvidia".