But if you want to control fan speed, only very rudimentary tools seem available, like the fancontrol shell script. If you want to just see temperature, lm-sensors will show you that in a friendly way. User mode software is needed to actually set fan speeds based on current temperatures. However, this merely provides an interface for reading temperature or writing PWM values.
This stuff is available via the /sys file system, for example fan control via /sys/devices/virtual/hwmon/hwmon2/pwm1. In fact, people have reverse engineered its register space, but over the years standards and consistency have been hard to come by unless some killer app/feature/competitor forces the issue, so they scatter such things around as hardware needs dictate and then assume they will pretty it up in software.The Linux kernel supports a wide variety of temperature monitoring and fan speed control. Much like the corsair USB situation - its just a dumb device on the USB bus. Even if you know its on an i2c bus for instance, you still need to know what registers are there and how they work to control/view it (hence my question about lm_sensors, I am too lazy to figure it out myself if someone already has). Tonka-tommy, to incompletely answer your question and share your frustration - I doubt anyone is trying to hide anything, but rather linux needs to be made aware of how/where/what it needs to talk to get this information and control these things. Personally I use the bios to manage my fans both CPU and case fans, ASUS bios is very good at this, once you set them to your liking it's done, I don't like installing software that is not needed, in my experience these programs can cause conflicts and issues that are difficult to troubleshootĩ8% agreed, I prefer to have the BIOS control things, but the 2% is that I do like to be able to check it in the OS which is where linux is problematic.
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