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Chrishas

Member

Registered: 2012-11-03

Posts: 26

[SOLVED] Backlight adjustment not working, Samsung NP740U3E

Hi everyone,

I don't know after which upgrade this happened but the backlight is not adjustable anymore on my laptop.
Although Gnome shows the backlight popup when I press the key for lowering it nothing happens apart from going completely off when it reaches the lowest setting.
The service systemd.backlight outputs the following:

 systemd-backlight@backlight:intel_backlight.service - Load/Save Screen Backlight Brightness of backlight:intel_backlight
   Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static)
   Active: active (exited) since Sat 2014-09-06 09:05:56 BST; 3h 19min ago
     Docs: man:systemd-backlight@.service(8)
  Process: 296 ExecStart=/usr/lib/systemd/systemd-backlight load %i (code=exited, status=0/SUCCESS)
 Main PID: 296 (code=exited, status=0/SUCCESS)

Sep 06 09:05:56 chris systemd[1]: Started Load/Save Screen Backlight Brightness of backlight:intel_backlight.

dmesg doesn't output anything when I try to adjust it.

Any help would be appreciated.

Cheers,
Chris

Last edited by Chrishas (2014-09-07 11:08:32)

Head_on_a_Stick

Member

From: London

Registered: 2014-02-20

Posts: 7,744

Website

Re: [SOLVED] Backlight adjustment not working, Samsung NP740U3E

If you're using an Intel card, you need to add this to your kernel parameters to regain backlight control with kernel 3.16:

video.use_native_backlight=0

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Are you infected with Wetiko?

Chrishas

Member

Registered: 2012-11-03

Posts: 26

Re: [SOLVED] Backlight adjustment not working, Samsung NP740U3E

If you're using an Intel card, you need to add this to your kernel parameters to regain backlight control with kernel 3.16:

video.use_native_backlight=0

Thanks Head_on_a_Stick, that solved it .:)