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I have toshiba satellite L745 with nvidia GEFORCE graphics card. I installed nvidia server setting from ubuntu software center. Still I can't decrease the brightness. When I use the function key to decrease, brightness indicator shows it's decreasing but it doesn't.

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Reset to default
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Looking up on this very site has brought me to this question and the solution mentioned there was:

  1. Open a terminal (Program - Accessories - Terminal)
  2. Type in "sudo gedit /etc/default/grub" (without the "")
  3. Find the line that says: GRUB_CMDLINE_LINUX="quiet splash"
  4. Edit it so it says: GRUB_CMDLINE_LINUX="quiet splash acpi_backlight=vendor"
  5. Save and exit
  6. Run the command "sudo update-grub" (again without quotes of course)
  7. Reboot and enjoy!

Hope this helps :)

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  • Please don't copy other peoples answers from the site as yours, leave a comment below the question saying it is a duplicate -1
    – Mark Kirby
    Apr 30, 2016 at 16:52
  • I would definitely keep it in mind. Understood :)
    – Surya Teja Karra
    Apr 30, 2016 at 16:52
  • OK I will change my vote so you don't loose rep, just remember, we have a way to deal with duplicate questions.
    – Mark Kirby
    Apr 30, 2016 at 16:54
  • GRUB_CMDLINE_LINUX="quiet splash" , is not in the file. Rather you'd find GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    – noitanec
    Apr 30, 2016 at 19:07

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