Ubuntu

/sys/class/backlight directory is empty MSI GS60 Ghost Pro

Asked by David

I just installed Ubuntu 14.04 on a new MSI GS60 Ghost Pro 6QE laptop. I am unable to change the screen brightness either manually by changing values in files in the /sys/class/brightness directory (there are no files in that directory), or through the GUI by System Settings>Brightness and Lock.

I believe this indicates that hardware in my computer is not recognized, based on this question: http://askubuntu.com/questions/577539/dell-chromebook-11-unable-to-set-backlight-and-sys-class-backlight-folder-is

Thanks for any help!

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actionparsnip (andrew-woodhead666) said : 		#1

Try the boot option:

acpi_backlight=vendor

May help

Revision history for this message
David (davidaugustmoon) said : 		#2

I changed the line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

and then ran:

sudo update-grub
sudo reboot

This made no apparent changes to my system. The /sys/class/brightness directory is still empty, and the hotkeys for changing screen brightness have no effect.

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Launchpad Janitor (janitor) said : 		#3

This question was expired because it remained in the 'Open' state without activity for the last 15 days.