[SOLVED] Slackware 13.37 Samsung Backlight

roberto967 · 06-19-2011, 06:16 AM

Quote:

Originally Posted by Iwantslack

I dont know if your method wold work.... heres my 20-nvidia.conf. i deleted xorg.conf completely and im able to adjust the brightness via the power managment of KDE. And FN Keys wont work for me either. But to adjust the screenbrighntee via the power management (since it is in your dock) is more elegant than the gamma adjustment

The 20-nvidia.conf is a file that you have to create on your own. the nvidia driver only creates a xorg.conf.

It works! Thank you. Great hint!

Iwantslack · 06-25-2011, 12:09 PM

Soooooo

After a lot experimentation and really hard work i didnt find a solution for my problem. Here are the facts:

I can adjust the Screen Brightness via the KDE Power Management.
The FN Keys are working and KDE shows me the OSD for Screenbrightness when i press the combo for increasing/decreasing the Brightness. But it changes nothing.

Do the KDE Powermanagement have permissions that my Keyboard doesnt have?

It seems to be a small Problem, but i dont geddit..............

repentorperish · 06-27-2011, 04:18 PM

I have absolutely no idea whether this will work for you, but a completely different line of attack that might pay off:

Backlight adjustment with hotkeys has never Just Worked for me (although the power management tool in KDE does) on a Sony Vaio.

My workaround is to use xbacklight. This is a command-line tool but obviously you can set up KDE to associate it with whatever hotkeys you like, including, usually, your laptop-specific Fn-combination.

roberto967 · 06-28-2011, 01:22 AM

Quote:

Originally Posted by repentorperish

My workaround is to use xbacklight. This is a command-line tool but obviously you can set up KDE to associate it with whatever hotkeys you like, including, usually, your laptop-specific Fn-combination.

Can you please provide some detail on how xbacklight works? Tnanks

Iwantslack · 06-28-2011, 03:10 AM

Thanks for the hint repentorperish, but xbacklight says that there is no device with backlight abilities (or something else).

repentorperish · 06-30-2011, 04:38 PM

Sorry it didn't work for you Iwantslack. For roberto, there's a man page here: http://linux.die.net/man/1/xbacklight

So basically once it's running as a daemon (start just with xbacklight &), you would bind the following commands to your preferred hotkeys:

Code:

xbacklight -inc 20
xbacklight -dec 20

It seems that the numbers get rounded at some stage in the process, so I've found that it doesn't always work with increments smaller than 15 or 20.

roberto967 · 07-01-2011, 01:35 AM

Thanks for help repentorperish, but I get "No outputs have backlight property" too

Quote:

Originally Posted by repentorperish

Sorry it didn't work for you Iwantslack. For roberto, there's a man page here: http://linux.die.net/man/1/xbacklight

So basically once it's running as a daemon (start just with xbacklight &), you would bind the following commands to your preferred hotkeys:

Code:

xbacklight -inc 20
xbacklight -dec 20

It seems that the numbers get rounded at some stage in the process, so I've found that it doesn't always work with increments smaller than 15 or 20.

repentorperish · 07-01-2011, 09:26 PM

Quote:

Originally Posted by roberto967

Thanks for help repentorperish, but I get "No outputs have backlight property" too

May not be any use, but there are a couple of responses to that error here:

Iwantslack · 08-17-2012, 09:07 AM

After skipping 13.37 because of my Issues Im glad to report that in Slackware 14.0 my Backlight is working

Simply add Option "RegistryDwords" "EnableBrightnessControl=1" to the Device Section of the by the nvidia driver created xorg.conf and everything is fine. After a year, i mark this thread solved