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Samsung NF210 Brightness not working

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http://crunchbang.org – I have a Samsung NF210 and while the Fn-Brightness keys are registering (that is the brightness pop-up with the amount of brightness bar is showing and changing) the actual brightness is not changing. Volume works fine.I have tried addingacpi_osi=linuxto grub as suggested by another post with a similar, but not exact, laptop. However that didn't work.  It has worked with very recent versions of Fedora and Ubuntu, but in fairness overall many distros have problems with this particular laptop.Any tips on troubleshooting or solving this issue?Thanks much!Ace (HowTos)

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Submitted by ziyi on 02/02/2013

Stories similar to Samsung NF210 Brightness not working

Definitely a laptop problem, hopefully not a hardware problem.

When I try to adjust my laptops screen brightness, it goes to some very low brightness and then the screen starts flickering (ie changing between different brightness levels). When my laptop boots, it's at full brightness, and when I adjust that, flickering starts. After that I cannot get it back to any non-very-low brightness.

I have a Toshiba l755 laptop, and I installed 12.04 64bit on it. The default brightness of the laptop is set to maximum value, and I can't change it.

If I go to Configuration → Brightness, the brightness doesn't change and neither does pressing the function keys.

Hardware: 13" MacBook Pro 5,5 (Summer 2009), GeForce 9400M.

OS: Ubuntu 12.04.2 AMD64

My hardware and OS are similar to what some others with this problem had, but what worked for them doesn't work for me.

Unfortunately, with the nvidia driver, the brightness controls (F1 and F2) do not work - no feedback at all.

Is there a way to prohibit Powerdevil from messing with the screen brightness?

I already tried to disable the tick box "Let PowerDevil manage screen powersaving" but that does not fix it. It still controls brightness.

I had installed Ubuntu 12.04 i my Toshiba Laptop Satellite C665-I5011

In this I am not able to change the LCD brightness. When i press Fn+F6 or Fn+F7 the brightness bar is changing but the LCD screen brightness is not changing.

Can someone help me in this to solve this

Thanks for the Help Dino

Brightness of my Laptop LCD 2 years 41 weeks ago

Hi everyone, when I start my computer it starts with max brightness, I don't like it. So in rc.local I put

Quote:

echo -n 25 >/proc/acpi/video/GFX0/LCDD/brightness

It work fine for run-level 3, but when I startx the brightness go to max again. Can I control/save brightness for X.

I use slackware64 13.1 with a Ati graphic card.

I usually have laptop-mode tools configure my brightness. Essentially, it sets the brightness to 12 on AC and 7 on battery. This worked fine until a recent update. This coincided with the upgrade to the latest kernel in the stable repo but I'm not sure the kernel is responsible. Basically, when I boot, brightness is now at 100% (15). If I remove the AC, brightness is correctly set to 7.

Hi all,

So i've recently installed Kubuntu 13.04 on my Vivobook V300 and i've just noticed a strange bug with my keyboard brightness FN keys. If I use the Brightness Down button it works as expected, however if I use the Brightness Up key it seems to scroll through 3 different brightness levels before returning to the first and repeating the process.

I had installed Ubuntu 12.04 i my Toshiba Laptop Satellite C665-I5011

In this I am not able to change the LCD brightness. When i press Fn+F6 or Fn+F7 the brightness bar is changing but the LCD screen brightness is not changing.

Can someone help me in this to solve this?