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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1Possible duplicate of Cannot change backlight brightness Ubuntu 14.04 and Screen brightness isn't taking effect on a Lenovo Z570 – Pavan Apr 30 '16 at 16:38
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Looking up on this very site has brought me to this question and the solution mentioned there was:
- Open a terminal (Program - Accessories - Terminal)
- Type in "sudo gedit /etc/default/grub" (without the "")
- Find the line that says: GRUB_CMDLINE_LINUX="quiet splash"
- Edit it so it says: GRUB_CMDLINE_LINUX="quiet splash acpi_backlight=vendor"
- Save and exit
- Run the command "sudo update-grub" (again without quotes of course)
- Reboot and enjoy!
Hope this helps :)
Surya Teja Karra
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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 '16 at 16:52
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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 '16 at 16:54
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GRUB_CMDLINE_LINUX="quiet splash" , is not in the file. Rather you'd find GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" – noitanec Apr 30 '16 at 19:07