Ubuntu: Brightness not working after installing NVIDIA driver



Question:

I recently installed Ubuntu 11.10 on my Mac Book Pro 7,1. I installed the NVIDIA driver (285). The brightness keys are working (F1 and F2) and I get the box showing the brightness but it does nothing. I can change the brightness in the NVIDIA X Server Settings application. How can I get the brightness working without uninstalling the driver? Thanks in advance.


Solution:1

I was able to get my brightness keys working on my Lenovo W530 on Ubuntu 12.04.

These days X automatically configures itself, so creating an xorg.conf file might make your system inflexible. Instead you can add a section to a file in /usr/share/X11/xorg.conf.d/ and X will include that section in the configuration that it automatically generates.

So to get the screen brightness keys working with your Nvidia graphics card, create a file in the xorg.conf.d directory, e.g:

sudo gedit /usr/share/X11/xorg.conf.d/10-nvidia-brightness.conf  

Paste the following into the file:

Section "Device"      Identifier     "Device0"      Driver         "nvidia"      VendorName     "NVIDIA Corporation"      BoardName      "Quadro K1000M"      Option         "RegistryDwords" "EnableBrightnessControl=1"  EndSection  

Log out and log back in, or reboot, and your brightness keys should now work!

(I blogged this here)


Solution:2

I had a similar issue with my laptop, there is an option you need to add to your /etc/X11/xorg.conf

  1. Run command:

    sudo nano /etc/X11/xorg.conf  
  2. Find the line Section "Device" and add the following

    Option "RegistryDwords" "EnableBrightnessControl=1"      


Solution:3

You need to enable Brightness Control. Open terminal and type sudo gedit /etc/x11/xorg.conf And then add Option "RegistryDwords" "EnableBrightnessControl=1" inside the ** device section**, make it new line. Then restart your computer and everything should be fine.


Solution:4

Thank you for providing the great script qgj. It's sad that this bug still persists and the work-around is needed. I had the same issue as James getting an error due to the options no longer being valid with nvidia-settings for my specific display type. As luck would have it, there is a better setting available for backlight brightness. I have modified the bash script to use this setting instead.

#!/bin/bash    # This script was originally created by 'qgj' from askubuntu.  It has been modified  # to work using the BacklightBrighness setting available for some displays on the currrent nvidia driver  # It has also been modified to remove display specific configuration, instead applying the setting to all   # active displays which support the BacklightBrightness setting.  # Tested only with nvidia-settings-319.12 and nvidia-drivers-331.20 on Linux Mint 17 Mate  #  # Requirements:  # - NVIDIA Drivers (e.g. nvidia-current in Ubuntu)  # - NVIDIA Settings (nvidia-settings in Ubuntu)  #  # 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.  #   # If this script fails, your display likely does not support the 'BacklightBrightness' option.  # In that event, execute 'nvidia-settings -n -q all' to see which options are available for the displays  #  # "nvidia-brightness.sh" may be run from the command line or can be assigned to the brightness keys on your Keyboard  # Type "nvidia-brightness.sh --help" for valid options.    if [ -z "${BASH}" ] ; then      echo "please run this script with the BASH shell"       exit 1  fi    usage ()  {  cat << ENDMSG  Usage:      nvidia-brightness.sh [ options ]    Options:     [ -bu ] or [ --brightness-up ]    increase brightness by 10     [ -bu <no> ] or                        [ --brightness-up <no> ]          increase brightness by specified <no>       [ -bd ] or [ --brightness-down ]  decrease brightness by 10     [ -bd <no> ] or                        [ --brightness-down <no> ]        decrease brightness by specified <no>       [ -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                                        brightness will be set to 100.     [ -l ]  or [ --load-config ]      Load current settings from ~/.nvidia-brightness.cfg                                       (e.g. as X11 autostart script)    Examples:     nvidia-brightness -bd       this will decrease gamma by 10     nvidia-brightness -bu 15    this will increase brightness by 15  ENDMSG  }    case $1 in       -h|--help)          usage          exit 0  esac    if [ "$1" != "-i" -a "$1" != "--initialize" ] ; then      if [[ ! -f ~/.nvidia-brightness.cfg ]]; then           echo 'You must run this script with the --initialize option once to create the settings file.'          echo 'Type "nvidia-brightness.sh --help" for more information.';          exit 1      fi  fi    #### INITIALIZE ####  initialize_cfg ()  {      BRIGHTNESS_TEMP=100      echo "BRIGHTNESS=$BRIGHTNESS_TEMP" > ~/.nvidia-brightness.cfg        source ~/.nvidia-brightness.cfg      echo "BRIGHTNESS: $BRIGHTNESS"        # Valid BacklightBrightness values are between 0 and 100      # Example:  nvidia-settings -n -a BacklightBrightness=80      nvidia-settings -n -a BacklightBrightness=$BRIGHTNESS 1>/dev/null      exit $?  }    #### LOAD CONFIGURATION ####  load_cfg ()  {      source ~/.nvidia-brightness.cfg      echo "BRIGHTNESS: $BRIGHTNESS"        nvidia-settings -n -a BacklightBrightness=$BRIGHTNESS 1>/dev/null  }    #### BRIGHTNESS CHANGE ####  brightness_up ()  {      source ~/.nvidia-brightness.cfg        [[ -z $1 ]] && BRIGHTNESS_INC=10 || BRIGHTNESS_INC=$1      BRIGHTNESSNEW=$(( $BRIGHTNESS + $BRIGHTNESS_INC ))      [[ $BRIGHTNESSNEW -gt 100 ]] && BRIGHTNESSNEW=100        sed -i  s/.*BRIGHTNESS=.*/BRIGHTNESS=$BRIGHTNESSNEW/g ~/.nvidia-brightness.cfg        source ~/.nvidia-brightness.cfg      echo "BRIGHTNESS: $BRIGHTNESS"        nvidia-settings -n -a BacklightBrightness=$BRIGHTNESS 1>/dev/null  }    brightness_down ()  {      source ~/.nvidia-brightness.cfg        [[ -z $1 ]] && BRIGHTNESS_INC=10 || BRIGHTNESS_INC=$1      BRIGHTNESSNEW=$(( $BRIGHTNESS - $BRIGHTNESS_INC ))      [[ $BRIGHTNESSNEW -lt 0 ]] && BRIGHTNESSNEW=0        sed -i  s/.*BRIGHTNESS=.*/BRIGHTNESS=$BRIGHTNESSNEW/g ~/.nvidia-brightness.cfg        source ~/.nvidia-brightness.cfg      echo "BRIGHTNESS: $BRIGHTNESS"        nvidia-settings -n -a BacklightBrightness=$BRIGHTNESS 1>/dev/null  }    if [[ "$3" != "" ]]; then      usage      exit 1  fi    error_mixed_brightness ()  {      echo "Error: [ --brightness-up ] and [ --brightness-down ] can't be used together."  }    if [[ "$2" != "" ]]; then      [[ ! "$2" == ?(-)+([0-9]) ]] && usage && exit 1  fi    case $1 in      -bu|--brightness-up)           [ "$2" == "-bd" ] && error_mixed_brightness && exit 1          [ "$2" == "--brightness-down" ] && error_mixed_brightness && exit 1          brightness_up $2          ;;      -bd|--brightness-down)           [ "$2" == "-bu" ] && error_mixed_brightness && exit 1          [ "$2" == "--brightness-up" ] && error_mixed_brightness && exit 1          brightness_down $2          ;;      -h|--help)           usage          exit 0          ;;      -i|--initialize)          if [ "$2" != "" ]; then usage; exit 1; fi             initialize_cfg          exit $?          ;;      -l|--load-config)          if [ "$2" != "" ]; then usage; exit 1; fi             load_cfg          exit 0          ;;      *)           usage          exit 1  esac  

Your mileage may vary with this script as some displays/adapters support different options. If you encounter issues with it please read the help and comments in the script.

Hope it helps someone!


Solution:5

There are some computers, such as my Lenovo W520, that don't with the Option "RegistryDwords" "EnableBrightnessControl=1" line. If you are one of those unlucky ones, you can try the nvidiabl driver (link here).

The nvidiabl driver provides a proper way to change the screen brightness. On some laptops the Option "RegistryDwords" "EnableBrightnessControl=1" hack will cause the backlight controller or your GPU to emit a high pitched noise.

Just download and install the latest Deb file from here: https://github.com/downloads/guillaumezin/nvidiabl/nvidiabl-dkms_0.72_all.deb

and run:

echo "nvidiabl" | sudo tee -a /etc/modules  

to ensure that the module will be loaded when the computer boots.


Solution:6

Im personally using Vaio VPCCW21FX (Nvidia Graphic) and Ubuntu Studio 11.10 .. I tried many solutions and nothing could resolve my problem with LCD brightness! Finally wrote these two perl files to manually set brightness/Contrast and Gamma functions inside Nvidia driver config file.

This will be helpfull only if you are able to change brightness within Nvidia X Server Settings

Step 1: create this file and name it "Brightness-Up.pl" (you can use any text editing tool like : gedit,nano,vi,etc.. copy & paste)

    ### Code by forgottenrip@yahoo.com ###      my $find1 = "0/RedBrightness=";my $find2 = "0/RedGamma=";  open FILE, "<Nvidia-Settings.cfg";  my @lines = <FILE>;  for (@lines) {      if ($_ =~ /$find1/) { chomp $_;$value= substr($_,16,5); }      if ($_ =~ /$find2/) { chomp $_;$value2= substr($_,11,5);}       }  my @Lines;  if ( $value > 0.0) { $value = $value - 0.30 };    if ( $value2 > 1.1) { $value2 = $value2 - 0.08 };    $last_value = $value + 0.30;  $Lines[0] ="0/RedBrightness=".$last_value;  $Lines[1] ="0/GreenBrightness=".$last_value;;  $Lines[2] ="0/BlueBrightness=".$last_value;;  $last_value = $value + 0.30;  $Lines[3] ="0/RedContrast=".$last_value;;  $Lines[4] ="0/GreenContrast=".$last_value;;  $Lines[5] ="0/BlueContrast=".$last_value;;  $last_value = $value2 + 0.08;  $Lines[6] ="0/RedGamma=".$last_value;;  $Lines[7] ="0/GreenGamma=".$last_value;;  $Lines[8] ="0/BlueGamma=".$last_value;;    $filename = "Nvidia-Settings.cfg";  open fh2,'>',$filename or die ("can't open '$filename': $! \n");  foreach ( @Lines )  { chomp;print "$_\n";print fh2 "$_\n"; };  close fh2;   `nvidia-settings -l --config=Nvidia-Settings.cfg`;  

Step 2: then make another file, name it "Brightness-Down.pl" and fill with this code:

    ### Code by forgottenrip@yahoo.com ###      my $find1 = "0/RedBrightness=";my $find2 = "0/RedGamma=";  open FILE, "<Nvidia-Settings.cfg";  my @lines = <FILE>;  for (@lines) {      if ($_ =~ /$find1/) {chomp $_;$value= substr($_,16,5);}      if ($_ =~ /$find2/) {chomp $_;$value2= substr($_,11,5);}       }  my @Lines;  if ( $value < -0.80) { $value = $value + 0.30 };    if ( $value2 < 0.8) { $value2 = $value2 + 0.08 };    $last_value = $value - 0.30;  $Lines[0] ="0/RedBrightness=".$last_value;  $Lines[1] ="0/GreenBrightness=".$last_value;;  $Lines[2] ="0/BlueBrightness=".$last_value;;  $last_value = $value - 0.30;  $Lines[3] ="0/RedContrast=".$last_value;;  $Lines[4] ="0/GreenContrast=".$last_value;;  $Lines[5] ="0/BlueContrast=".$last_value;;  $last_value = $value2 - 0.08;  $Lines[6] ="0/RedGamma=".$last_value;;  $Lines[7] ="0/GreenGamma=".$last_value;;  $Lines[8] ="0/BlueGamma=".$last_value;;    $filename = "Nvidia-Settings.cfg";  open fh2,'>',$filename or die ("can't open '$filename': $! \n");  foreach ( @Lines )  { chomp;print "$_\n";print fh2 "$_\n"; };  close fh2;   `nvidia-settings -l --config=Nvidia-Settings.cfg`;  

Step 3: You need to create another file which contains Nvidia Settings.. name it "Nvidia-Settings.cfg" its important that you write name exactly same. fill with:

0/RedBrightness=0.1  0/GreenBrightness=0.1  0/BlueBrightness=0.1  0/RedContrast=0.1  0/GreenContrast=0.1  0/BlueContrast=0.1  0/RedGamma=1.14  0/GreenGamma=1.14  0/BlueGamma=1.14  

Thats it! now place these files in unique folder.. you have to bind your Function Keys to these two perl file.you can use Compiz>commands to do that. Run below command to install the compizconfig-settings-manager

sudo apt-get install compizconfig-settings-manager  

or even you can run seperately with these two commands in shell (terminal):

user$ perl Brightness/Brightness-Up.pl  user$ perl Brightness/Brightness-Down.pl  

where Brightness is folder I put those files in it.


Solution:7

FYI, just worked through this on a Lenovo W520, and the addition of the simple line Option "RegistryDwords" "EnableBrightnessControl=1"

to xorg.conf was enough - no need for any of the other bogosity, and all works fine with a current NVidia release (specifically, running 346.35)


Solution:8

NVIDIA brightness bash script

The above perl script didnt work for me so I wrote my own script as a bash script (since I don't know perl). It got a bit long but it creates the settings file by itself and can be used with command line options to adjust brightness or gamma or both at the same time. I use it with the --brightness-up and --brightness-down switches for the brightness keys on my Keyboard. Easy to assign in XFCE4 and surely also in 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  

Usage:

Save the file somewhere in your PATH e.g.

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

Don't forget to

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

Before you can use it you have to type

nvidia-brightness.sh -i  

This will create the settings file and can also be used to reset the brightness at any time.

Type

nvidia-settings.sh --help  

for more 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  


Solution:9

The other answers are good steps to try, but note that some combinations of Ubuntu/Linux Kernel and the Nvidia driver just won't work. I used 12.04 for years, and even though I tried all the above answers, I couldn't get any of the Nvidia drivers to support screen dimming on my Macbook Pro 5,5.

When I finally upgraded to 14.04, I tried the Nouveau driver, which did support screen dimming, and was generally faster and more reliable and Nvidia. Unfortunately, it doesn't support suspend/resume, making it useless on a laptop. I switched back to Nvidia, but several drivers caused X/lightdm to crash, preventing me from even logging in. I finally found that the Nvidia 340 driver was stable with my Macbook Pro 5,5 and Ubuntu 14.04 and also supported dimming.


Solution:10

I had the same problem in Ubuntu 16.10, after upgrading from 16.04. In the xorg.conf file, change the driver from "intel" to "nvidia".


Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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