Small daemon to set screen temperature. ctempd can either set the screen's temperature once with the -s option or run in the background and set the screen's temperature automatically based on the time of day.
- Set screen temperature continuously in the background
- Set screen temperature once
ctempd is written in C and known to work on the operating systems listed in the table below. To compile it you need the following things:
- A recent C compiler (tested with both clang >= 11 and GCC >= 8)
- make (tested with both BSD and GNU make)
- libXrandr
- libX11 core development libraries
Install the dependencies as follows:
| Operating System | Commands and Notes |
|---|---|
| FreeBSD | pkg install xorg |
| OpenBSD | All installed by default |
| Ubuntu | apt install build-essential libxrandr-dev |
| Void Linux | xbps-install gcc make libXrandr-devel libX11-devel |
By default, the Makefile looks for external includes and libraries in /usr/local/{include,lib}, /usr/X11R6/{include,lib}. If your distribution uses special path, you have to modify the Makefile accordingly.
Compile and install with the following commands:
$ make
# make install
Let ctempd automatically adapt the screen temperature based on the time of day. The highest temperature at noon is 5400K:
$ ctempd 5400
ctempd logs via syslog, you can check the current temperature in your system's log messages.
Set the screen temperature to 3200K once.
$ ctempd -s 3200
isscrolls was written by Matthias Schmidt and is public domain. The algorithm to set the screen temperature was written by Ted Unangst and is also public domain.