I had this problem before, with my old Mac Mini and I just don't recall what I did to solve it. But let me tell you what's the issue.
Regardless if I'm using a web browser or a video app, the display keeps dimming itself whenever it wants (especially when in full screen).
I have 2 external LG monitors, never had an issue with the setup itself. One uses the HDMI, the other - I have a dongle connected to the USB-C and there's an HDMI on that dongle. It works. No issues there.
I just want to stop it freely dimming the display. Is there a solution to this? This is what my Displays settings look like:
Regardless if I'm using a web browser or a video app, the display keeps dimming itself whenever it wants (especially when in full screen).
I have 2 external LG monitors, never had an issue with the setup itself. One uses the HDMI, the other - I have a dongle connected to the USB-C and there's an HDMI on that dongle. It works. No issues there.
I just want to stop it freely dimming the display. Is there a solution to this? This is what my Displays settings look like: