I'm looking for an app to control my screen brightness, and if it is possible the color temperature also (mostly for hot(sepia) and cold(blue) tones), I want it for reading on the pc.

I found this wingpanel-indicator-nightlight but it doesn't work, probably because I'm not using a desktop environment but a window manager (Awesome).

Monitor is AOC M2470SW which have a HDMI connector.

Not sure what you're hoping to get here if you provide zero useful information such as make / model of graphics card and monitor.

Also, unless you're doing hardware calibration of your monitor with something like an X-Rite i1 setting a colour temperature is meaningless.

there is an app called ddccontrol which can send some commands to the monitor. Also there is a gui frontend available. Need to play a bit to find out how, but probably works.

Maybe this will help.

http://sandipbgt.com/2015/10/01/cont...ine-in-ubuntu/

My bad, my monitor is an AOC M2470SW which have a HDMI connector. Maybe I didn't explain myself well enough, with color temperature I mostly was referring to make it more sepia or more cold(blue), I'm not doing calibration I just want it to read books in my pc, with xrandr I can control the brightness and that's nice but it would be better if I could add some tones of sepia to relax even more my eyes when reading.

It seems that is exactly what I was looking for, since it is like a software equivalent to your monitor physical controllers, so I even can manipulate de RGB values, that is pretty nice.

But to make it work I need the exact path of my device in the form of path/to/my/device, at least that is what I understand reading from the --help command.

I was searching on the web for how to get that information but I couldn't found anything useful, I tried with lspci, lshw, lsdev, but non of them gets me the path/to/my/device, the ddccontrol man page doesn't have so much information tho, there it says that "the programm is fully documented" at /usr/share/doc/ddccontrol/html/index.html but I don't have that file.

Thank you! it certainly serves for my purpose which is reading.

I used this page: https://askubuntu.com/questions/8607...isplay-monitor

Yep I tried the -p flag before and it seems my monitor doesn't support DDC/CI.

did you check those kernel modules? What kind of monitor is it? How is it connected?

Excuse for my ignorance but, how can I check if I have those kernel modules? all that I know is that I have installed the i2c-tools package.

My monitor is AOC M2470SW which have a HDMI connector.

lsmod will tell you the loaded modules. For me it looks like:
for you it can be different, but if this command returns nothing - then you need to load these modules.

Thank you for trying to guide me on this.

Mine displays this:

So it seems I'm lacking i2c-dev, I was searching for how to install that driver in arch linux (cause it is not in the official nor AUR repositories) but found nothing.

do you have /dev/i2c* devices?

No, I don't have that file or directory.

so if you have no /dev/i2c-0 /dev/i2c-1 .... (or similar) devices you need to find the kernel module and "install" it.
which kernel is it?

My kernel is Linux 5.8.7-arch1-1 x86_64, I was looking for how to install modules but I just found how to load them, and trying

I get this error message: modprobe: FATAL: Module i2c not found in directory /lib/modules/5.8.7-arch1-1

It seems I need to download the module then, but it is not in the arch official repositories neither the AUR either it seems.

How can I know if a package have the drivers I'm looking for? When I query a specific package with the pacman helper 'yay', I can get all this information (this is just an example):

I guess I should look into the package that have i2c-0 or i2c-1 in the field named 'Provides' right?