Xorg framebuffer and brightness of screen

[Felix Miata]

Riza Dindir composed on 2021-11-11 10:16 (UTC+0300):

>> On Wed, Nov 10, 2021 at 10:15:18AM +0300, Riza Dindir wrote:

>>> I woukd like to know if I can adjust the screen brightness when using the
>>> framebuffer device on xorg?

> I am using gop, and a framebuffer. When i try to use the xrandr, it says
> "gamma is set to 0", or "failed to get size of gamma for output default".

> I can set the gamma uaing xgamma and in the xorg.conf file.
											
If you upload /var/log/Xorg.0.log to a pastebin and share its URL someone may spot
a clue to your obstacle.
-- 
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	based on faith, not based on science.

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Felix Miata