Hello Ken 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. Riza On Wed, Nov 10, 2021, 21:30 Ken Moffat <[email protected]> wrote: > On Wed, Nov 10, 2021 at 10:15:18AM +0300, Riza Dindir wrote: > > Hello All, > > > > I woukd like to know if I can adjust the screen brightness when using the > > framebuffer device on xorg? > > > > Thanks in advance. > > Riza > > Probably, assuming you want to reduce the brightness. A desktop > environment might provide something (my laptop now runs xfce, one of > the panel plugins provides that), but in the past I've used xrandr. > > xrandr --output <name> --brightness <value> > > You'll need to discover the output names on your own machine > xrandr --verbose | less > and look for the 'connected' item (usually a variant of DP, HDMI or > VGA). > > A value of 1.0 is full brightness, which is what you currently have. > Try different settings (maybe start at 0.75) and see if you can find > a value which suits. > > ĸen > -- > Vetinari smiled. "Can you keep a secret, Mister Lipwig?" > "Oh, yes, sir. I've kept lots." > "Capital. And the point is, so can I. You do not need to know.” >
