Author Topic: control the brightness (PWM) using the keyboard is it possible?  (Read 216 times)

Offline martro

  • Newbie
  • *
  • Posts: 2
  • Karma: +0/-0
    • View Profile
control the brightness (PWM) using the keyboard is it possible?
« on: September 27, 2017, 02:40:14 pm »
I have a cubieboard with a 7 '' lcd that works very well
I would like to control the brightness of the lcd using key keyboard
Ctrl+PageUp Ctrl+ PageDown or Alt or ....
Thank you for your help

Offline rgmhtt

  • Full Member
  • ***
  • Posts: 166
  • Karma: +2/-1
    • View Profile
Re: control the brightness (PWM) using the keyboard is it possible?
« Reply #1 on: September 29, 2017, 08:20:01 am »
Unlikely.  On INTEL, brightness is a BIOS function and the BIOS intercepting special keys.

armv7, as such does not have BIOS.  This type of control would have to be in UBOOT and the video driver.  So it will depend, in large measure, with the OS distro you are using.


Offline martro

  • Newbie
  • *
  • Posts: 2
  • Karma: +0/-0
    • View Profile
Re: control the brightness (PWM) using the keyboard is it possible?
« Reply #2 on: October 03, 2017, 03:25:02 am »
thank you for your reply rgmhtt,
the system used is linux-sunxi.
c'est pour le projet https://www.openvario.org
I would like to control the brightness with the keyboard