Dell Inspiron laptop 17 7000 - brightness function keys Fn-F11 and Fn-F12 not working












2















The function keys to control the screen brightness - Fn-F11 & Fn-F12 - are not working.



Xubuntu 18.10.



Dell Inspiron 17 7000 (7786) laptop



I have tried updating the boot parameters in /etc/default/grub



Currently running:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_osi=! "acpi_osi=Windows 2015""



I also tried these options:
"acpi_osi="
"acpi_osi=Linux"



Some more checks:



ls -l /sys/class/backlight


...shows nothing.



xrandr --verbose | grep Bright


...shows nothing.



sudo showkey


...shows 224 for Fn-F11 (brightness down) and 225 for Fn-F12 (brightness up).



The other function keys - volume, keyboard backlight, wireless on/off, etc... are working OK.










share|improve this question



























    2















    The function keys to control the screen brightness - Fn-F11 & Fn-F12 - are not working.



    Xubuntu 18.10.



    Dell Inspiron 17 7000 (7786) laptop



    I have tried updating the boot parameters in /etc/default/grub



    Currently running:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_osi=! "acpi_osi=Windows 2015""



    I also tried these options:
    "acpi_osi="
    "acpi_osi=Linux"



    Some more checks:



    ls -l /sys/class/backlight


    ...shows nothing.



    xrandr --verbose | grep Bright


    ...shows nothing.



    sudo showkey


    ...shows 224 for Fn-F11 (brightness down) and 225 for Fn-F12 (brightness up).



    The other function keys - volume, keyboard backlight, wireless on/off, etc... are working OK.










    share|improve this question

























      2












      2








      2








      The function keys to control the screen brightness - Fn-F11 & Fn-F12 - are not working.



      Xubuntu 18.10.



      Dell Inspiron 17 7000 (7786) laptop



      I have tried updating the boot parameters in /etc/default/grub



      Currently running:
      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_osi=! "acpi_osi=Windows 2015""



      I also tried these options:
      "acpi_osi="
      "acpi_osi=Linux"



      Some more checks:



      ls -l /sys/class/backlight


      ...shows nothing.



      xrandr --verbose | grep Bright


      ...shows nothing.



      sudo showkey


      ...shows 224 for Fn-F11 (brightness down) and 225 for Fn-F12 (brightness up).



      The other function keys - volume, keyboard backlight, wireless on/off, etc... are working OK.










      share|improve this question














      The function keys to control the screen brightness - Fn-F11 & Fn-F12 - are not working.



      Xubuntu 18.10.



      Dell Inspiron 17 7000 (7786) laptop



      I have tried updating the boot parameters in /etc/default/grub



      Currently running:
      GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset acpi_osi=! "acpi_osi=Windows 2015""



      I also tried these options:
      "acpi_osi="
      "acpi_osi=Linux"



      Some more checks:



      ls -l /sys/class/backlight


      ...shows nothing.



      xrandr --verbose | grep Bright


      ...shows nothing.



      sudo showkey


      ...shows 224 for Fn-F11 (brightness down) and 225 for Fn-F12 (brightness up).



      The other function keys - volume, keyboard backlight, wireless on/off, etc... are working OK.







      dell brightness 18.10 inspiron function-keys






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Feb 12 at 2:15









      David RobsonDavid Robson

      312




      312






















          1 Answer
          1






          active

          oldest

          votes


















          0














          This solution worked for me:



          Taken from:



          Brightness fn key shortcut doesn't work on ASUS laptop



          and



          13.10 Can't Adjust Dell Laptop Backlight



          ...but not the same.



          1. Create file: /usr/share/X11/xorg.conf.d/20-intel.conf



          Open terminal and type these commands:



          sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

          sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf


          Add the following lines to this file:



          Section "Device"
          Identifier "card0"
          Driver "intel"
          Option "Backlight" "intel_backlight"
          BusID "PCI:0:2:0"
          EndSection


          Save the file and close nano.



          2. Update Grub settings



          In a terminal and type these commands:



          sudo nano /etc/default/grub


          find the line starting with:



          GRUB_CMDLINE_LINUX_DEFAULT


          and add the option "acpi_backlight=vendor" (without the quotes).



          E.g.: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"



          Save the file and exit nano.



          In a in terminal:



          sudo update-grub


          Restart your laptop and it will work probably...






          share|improve this answer























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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            0














            This solution worked for me:



            Taken from:



            Brightness fn key shortcut doesn't work on ASUS laptop



            and



            13.10 Can't Adjust Dell Laptop Backlight



            ...but not the same.



            1. Create file: /usr/share/X11/xorg.conf.d/20-intel.conf



            Open terminal and type these commands:



            sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

            sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf


            Add the following lines to this file:



            Section "Device"
            Identifier "card0"
            Driver "intel"
            Option "Backlight" "intel_backlight"
            BusID "PCI:0:2:0"
            EndSection


            Save the file and close nano.



            2. Update Grub settings



            In a terminal and type these commands:



            sudo nano /etc/default/grub


            find the line starting with:



            GRUB_CMDLINE_LINUX_DEFAULT


            and add the option "acpi_backlight=vendor" (without the quotes).



            E.g.: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"



            Save the file and exit nano.



            In a in terminal:



            sudo update-grub


            Restart your laptop and it will work probably...






            share|improve this answer




























              0














              This solution worked for me:



              Taken from:



              Brightness fn key shortcut doesn't work on ASUS laptop



              and



              13.10 Can't Adjust Dell Laptop Backlight



              ...but not the same.



              1. Create file: /usr/share/X11/xorg.conf.d/20-intel.conf



              Open terminal and type these commands:



              sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

              sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf


              Add the following lines to this file:



              Section "Device"
              Identifier "card0"
              Driver "intel"
              Option "Backlight" "intel_backlight"
              BusID "PCI:0:2:0"
              EndSection


              Save the file and close nano.



              2. Update Grub settings



              In a terminal and type these commands:



              sudo nano /etc/default/grub


              find the line starting with:



              GRUB_CMDLINE_LINUX_DEFAULT


              and add the option "acpi_backlight=vendor" (without the quotes).



              E.g.: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"



              Save the file and exit nano.



              In a in terminal:



              sudo update-grub


              Restart your laptop and it will work probably...






              share|improve this answer


























                0












                0








                0







                This solution worked for me:



                Taken from:



                Brightness fn key shortcut doesn't work on ASUS laptop



                and



                13.10 Can't Adjust Dell Laptop Backlight



                ...but not the same.



                1. Create file: /usr/share/X11/xorg.conf.d/20-intel.conf



                Open terminal and type these commands:



                sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

                sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf


                Add the following lines to this file:



                Section "Device"
                Identifier "card0"
                Driver "intel"
                Option "Backlight" "intel_backlight"
                BusID "PCI:0:2:0"
                EndSection


                Save the file and close nano.



                2. Update Grub settings



                In a terminal and type these commands:



                sudo nano /etc/default/grub


                find the line starting with:



                GRUB_CMDLINE_LINUX_DEFAULT


                and add the option "acpi_backlight=vendor" (without the quotes).



                E.g.: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"



                Save the file and exit nano.



                In a in terminal:



                sudo update-grub


                Restart your laptop and it will work probably...






                share|improve this answer













                This solution worked for me:



                Taken from:



                Brightness fn key shortcut doesn't work on ASUS laptop



                and



                13.10 Can't Adjust Dell Laptop Backlight



                ...but not the same.



                1. Create file: /usr/share/X11/xorg.conf.d/20-intel.conf



                Open terminal and type these commands:



                sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf

                sudo nano /usr/share/X11/xorg.conf.d/20-intel.conf


                Add the following lines to this file:



                Section "Device"
                Identifier "card0"
                Driver "intel"
                Option "Backlight" "intel_backlight"
                BusID "PCI:0:2:0"
                EndSection


                Save the file and close nano.



                2. Update Grub settings



                In a terminal and type these commands:



                sudo nano /etc/default/grub


                find the line starting with:



                GRUB_CMDLINE_LINUX_DEFAULT


                and add the option "acpi_backlight=vendor" (without the quotes).



                E.g.: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"



                Save the file and exit nano.



                In a in terminal:



                sudo update-grub


                Restart your laptop and it will work probably...







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Feb 12 at 3:17









                David RobsonDavid Robson

                312




                312






























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