Linux On My Samsung

Hi all,

i have a Samsung rv520 with an Geforce GT 520m.
My OS is Kubuntu 12.04 Which packets i must install to controll the brigthness value?

thanks

It feels like none. I have the same notebook and brightness control is broken after upgrade to 12.04. It worked perfectly in 11.10 though. Now I can only decrease the brighness.

You need nvidia_bl module.

Google it nvidia-bl-dkms git repo and in the downloads section, download and install nvidia_bl0.74 for ubuntu 12.04.

Problem is, samsung-tools hotkeys doesn't work! You have to echo the /sys/class/backlight/nvidia_backlight/brightness file (with a range from 0 to 127).

I hope Voria will bind the echo with the hotkeys for this laptop!

Thanks!
Is 0.74 version compatible with Precise? In Voria's post he said that this driver was incompatible with the kernels in 12.04.

Well, it's compatible with archlinux with kernel 3.4.2.. I guess it's fine. In voria's repo there is a 0.73 version and it's not compatible. 0.74 fix kernel 3.2.x compilation (ubuntu kernel)

Just installed it. It works. But the driver does not start automatically.
And I cannot control the brightness with FN+up/down buttons.

Told ya hotkeys doesn't work.

Try loading nvidia_bl module at boot (MODULES in rc.conf)

Hi,

iam already there

I have now a clean installation of 12.04. But what should i exactly do to get the brightness work on my samsung rv520 ?

Thanks for reply

https://github.com/guillaumezin/nvidiabl/downloads

Install the latest .deb

I don't know if the new version let the fn keys work...(I had a problem with the monitor standby with 0.73 version and uninstalled).

To change the brightness manually just do:

echo XX > /sys/class/backlight/nvidia_backlight/brightness

XX -> from 0(min) to 128(max)

Hi,

i have installed the deb packet. But when i try to change the brightness over the terminal, i get an error message
becaue the folder / file nvidia Backlight didnt exsist.

Have yout a idea?

re,
i came a step forward! now i can change the brightness with you console command. But the maximum brightness i can adjust is nit very maximum can i change the maximum an minimum values?
Because when i want to set it for example on 100 The display is in my opinion on 15 oder 20 %.


regards

You neet to load the module nvidiabl with an option max_brightness = 10000

thanks for your help!