You should put in the title that this is only for Linux.
this post was submitted on 21 Jun 2025
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Your comment has now motivated me to add a Windows section :)
As a night shifter whose employer exclusively uses Windows, ty
It is also possible to make the monitor brightness show up as a normal system setting by using a kernel module. The other thing I read when I did this is that monitor flash memory that stores the settings, like brightness, is often particularly bad, having only 1000s of cycles. If you do use this, just keep that in mind
Edit: i checked again and 1000s of cycles is low. 100s of 1000s is more reasonable, but could still be reached fairly easily within the monitors lifespan if frequently adjusting
I'm curious about both things you mention. Do you have the name of the kernel module at hand? And can you point me to a source on the monitor flash memory (as I couldn't find anything on that)?
The kernel module is ddcci-driver-linux
This is the Reddit post I read. It links to a Hacker News forum post as well that discusses it. Really it shouldn't be much of a problem unless you're using dynamic brightness that is overzealous
Thank you, that's interesting and good to know. At least it's probably a good idea to not increment/decrement properties in very small steps (like 2% at a time) on a regular basis. I suspect the 5% steps I'm using for brightness should be fine, but I'll implement some shortcuts that go in bigger steps just to be sure.
How does one find an unknown register in hardware for a similar but undocumented setting? My laptop has an undocumented microcontroller for the RGB keyboard. I can change it through the extra function keys but only to a 3 level preset and not the real fine tuned control. I can dual boot and change the setting with their app and it is persistent. If I could discover all registers their app uses I would totally ditch w11 and free up a good bit of space. I figure it is just a block of memory somewhere, (thinking like Arduino stuff), but I am clueless about how to find that at OS level complexity... If anyone here casually knows at a conversational social level here, like don't go looking it up for me or whatnot
I know nothing about this, but can OpenRGB (Linux tool) talk to your device in any way?
Not as of a year or so back. I'm not sure how it works but there are several settings available in the manufacturer's app that are not in Linux. Only the hotkey settings from the fn+ function keys work. Dmesg spits out a block of unrecognized memory that is something like 8 or 16 bits long that is the likely culprit. There is some odd microcontroller on a serial bus that is unrecognized too IIRC but that I have never seen before like any of the thousands found on LCSC. Last time I checked linux-hardware.org, it looked like no one had solved this one on any of the scans. I'm not motivated to chase it down myself. Poking some registers or watching for the changed location after using the built in hotkey would be peripherally interesting as a general thing to know.
I feel you basically. I have given up trying to control the RGB on my RAM (even though it's probably decently documented somewhere).
I cranked my laptop display's gamma up to 11 using an icc profile because it wasn't bright enough for me. Or rather all the shitty content is too dark to see anything.