Change brightness works in Unity but not spectrwm
I use spectrwm so I want to be able to adjust the screen brightness using command line tools. However, none seem to be working. The odd thing is that if I run Unity and access the "Brightness" settings through the normal UI, the brightness correctly changes.
Tried:
- 'xbacklight -get' returns nothing.
- 'xbacklight -set' does nothing.
- 'xrandr -brightness' changes the contrast, but not the brightness.
I am using a Toshiba Tecra P5, running Ubuntu 14.04.
61 Answer
My installation was a fresh install, thus it used a lot of default settings in the setup.
Accessed the "Additional Drivers" window:
$ software-properties-gtk --open-tab=4
My graphics card (G86M Quadro NVS 130M) was using the open source Nouveau driver by default. Selected the recommended Nvidia binary driver (version 340.76 from nvidia-340 (proprietary, tested)), clicked on Apply Changes then restarted my laptop.
It now works!
xbacklight -get returns the current brightness percentage and xbacklight -set correctly adjust the brightness! This works both when running Unity or when using spectrwm.
More in general
"Zoraya ter Beek, age 29, just died by assisted suicide in the Netherlands. She was physically healthy, but psychologically depressed. It's an abomination that an entire society would actively facilitate, even encourage, someone ending their own life because they had no hope. Th…"
