fan_target_temperature(9)

🌸 fan_target_temperature 🌸

okay bestie, welcome to the amdgpu corner of the kernel — this is the manpage fan_target_temperature(9) from the Kernel API Manual, and it's literally the sysfs API for checking and adjusting the target tempeature in Celsius degree for fan control. (yes i said "tempeature", that's how it's spelled in the source, we don't fix, we don't judge, we slay 💅)

🎀 how to actually use it

• Reading back the file shows you the current setting and the permitted ranges — but only if they're changable. iykyk, vibe check first, always.
• Writing an integer to the file changes the setting accordingly. just an integer. that's the whole assignment. periodt.
• When you have finished the editing, write "c" (commit) to the file to commit your changes. no commit, no glory 🫶
• If you want to reset to the default value, write "r" (reset) to the file to reset them. the undo button, but make it sysfs ✨

ngl bestie, the "write c when you're done" part is not optional-optional. it's the whole commit step. don't leave your changes hanging like an unsent text 😭

🦋 the important caveats (read these fr fr)

This setting works under auto fan control mode only. It can co-exist with other settings which can work also under auto mode.

Paring with the acoustic_target_rpm_threshold setting, they define the maximum speed in RPM the fan can spin when ASIC temperature is not greater than target temperature. iconic duo behaviour honestly 👑

Setting via this interface will switch the fan control to auto mode implicitly — so like, surprise, you're in auto mode now. lowkey important to know 🧚

✨ SEE ALSO ✨

Kernel file ./drivers/gpu/drm/amd/pm/amdgpu_pm.c — go read the source, it's giving main character energy:

amdgpu_pm_dev_state_check(9), amdgpu_pm_get_access(9), amdgpu_pm_get_access_if_active(9), amdgpu_pm_put_access(9), power_dpm_state(9), power_dpm_force_performance_level(9), pp_table(9), pp_od_clk_voltage(9), pp_features(9), pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_fclk pp_dpm_dcefclk pp_dpm_pcie(9), pp_power_profile_mode(9), gpu_busy_percent(9), mem_busy_percent(9), vcn_busy_percent(9), pcie_bw(9), unique_id(9), thermal_throttling_logging(9), apu_thermal_cap(9), gpu_metrics(9), smartshift_apu_power(9), smartshift_dgpu_power(9), smartshift_bias(9), board(9), baseboard_temp(9), gpuboard_temp(9), cur_node_power_limit(9), node_power(9), npm_status(9), global_ppt_resid(9), max_node_power_limit(9), baseboard_power(9), baseboard_power_limit(9), pm_policy(9), hwmon(9), fan_curve(9), acoustic_limit_rpm_threshold(9), acoustic_target_rpm_threshold(9), fan_minimum_pwm(9), fan_zero_rpm_enable(9), fan_zero_rpm_stop_temperature(9)

okay that's the whole page, you ate that 💖 this cutie lives in ./drivers/gpu/drm/amd/pm and the version/date on the tin is October 2026 — screenshot it, cite it, cite me, whatever, mwah 🍓