Setting LCD backlight from commandline

Issues related to hardware problems
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pepa.chmel
Posts: 3
Joined: 2015/03/18 13:33:09

Setting LCD backlight from commandline

Post by pepa.chmel » 2016/02/23 13:28:20

Hi.

I Googling last few hours but without success.
I found various solutions but none of them works.

for example as root :
xbacklight -dec 100
RANDR Query Version returned error -1

Is there way I can at least turn Off / On display backlight?

Please Help.
Josef

pepa.chmel
Posts: 3
Joined: 2015/03/18 13:33:09

Re: Setting LCD backlight from commandline

Post by pepa.chmel » 2016/02/24 15:59:32

Nobody?

When I try set acpi_backlight=vendor than it removes all entries from /sys/class/backlight. Removing it from GRUB returns it back.
Something like tee /sys/class/backlight/acpi_video0/brightness <<< 5 does nothing with backlight. It changes value in those files.
:(

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