Hacker News Reader

Comment by pabs3 | Hacker News Reader

The ddcutil folks also have a great GUI btw:

https://www.ddcutil.com/#ddcui

Also, if you have ddcci-driver-linux installed, then the KDE desktop lets you adjust monitor brightness from the UI. Eventually Linux upstream might get the same functionality as the out-of-tree module.

https://gitlab.com/ddcci-driver-linux/ddcci-driver-linux

View on HN

In my experience the KDE desktop lets you set monitor brightness from the UI... and on Wayland it happens even if you don't ask it to (https://bugs.kde.org/show_bug.cgi?id=494497). You can turn it off by "setting the `POWERDEVIL_NO_DDCUTIL=1` environment variable in PowerDevil as described in its README file: https://invent.kde.org/plasma/powerdevil/-/blob/master/READM..."

And here I was assuming it was changing to intel arc or display port (due to the card) or wayland (due to the driver) that causes my screens to jump to 100% brightness after they turn off. I see it still isn't fixed after 5 months so if I can't go back to X after my next update I'm putting my old nvidia back in.

I'd recommend following the steps at https://invent.kde.org/plasma/powerdevil/-/blob/master/READM... to disable brightness control. You can switch to X11 too, but for some reason I get screen tearing and blocky incomplete updates I haven't looked for a workaround yet.

  systemctl --user edit plasma-powerdevil.service
  [Service]
  Environment="POWERDEVIL_NO_DDCUTIL=1"

EDIT: I tried switching to Wayland on Arc and am getting stuttery mouse cursor movement at around 36 FPS. I wonder what's wrong...

Reply on news.ycombinator.com