Install i8kutils: $ sudo apt-get install i8kutils You suffer from that as well according to a previous comment. If it works, but somewthing else is fighting back on the setted speed (reported by many users on Dell Latitude laptops), this is due to scheduled SMM sessions setting the fan speed back. Luckily there is a way to disable BIOS fan control by writing to SMM registers. Warning: see the warning in top of smm.c. However, I've seen no user reports on this causing trouble. Also, all reports on trying this have indicated success in disabling the BIOS fan control. What we'll do is to download the source code of i8kutils, compile the program smm, and run it with an apropriate argument to disable BIOS fan control by writing to SMM registers.ĭownload packages needed for building: $ sudo apt-get build-dep i8kutilsĭownload i8kutils source code, extract and enter directory (exact names depending on i8k version): $ apt-get source i8kutils I8kutils includes the source of a program smm but the i8kutils package does not include the compiled binary. If on a 64-bit system: $ gcc -g -O2 -Wall -I. Run smm with argument 30a3 to disable SMM fan control: $ sudo. They will return to 0% if the temperature is 65 C or less.Now, BIOS fan control should be disabled. For example, in my curves, the fans will always spin at 100% speed if the temperature is 95 C. When the minimum or maximum temperature is reached for both of these cards, their corresponding speed will trigger. Next, you need to set a minimum speed and a maximum speed. Basically, you're telling the app, "I want my temperature to never exceed X, but it's okay if it never goes below Y." Both cards require you to set a minimum and a maximum temperature. First, let's focus on the Target and Linear cards since they're very similar to each other. I've already configured these cards to my personal preference. For case fans, you can use the hottest motherboard, CPU, or GPU sensor as it doesn't matter too much. Before you do anything, you need to select a temperature source.įor CPU fans, use one of your CPUrelated sensors (pick the one with the highest temperature to be safe).
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