Fan control asrock/h81m-hds status
mgeins via coreboot <[email protected]> Tue, 13 Jan 2026 23:07:15 +0100
| Newsgroups | gmane.linux.bios |
|---|---|
| Message-ID | <[email protected]> |
Hello, Hardware is "ASROCK H81M-HDS/H81M-HDS, BIOS 25.09-224-ga73db6d45112 10/24/2025" without mrc.bin. System Debian Trixie Kernel 6.12.63+deb13-amd64. A few days ago, I was on IRC. Someone (sorry, I forgot the name) helped me a lot by advising me to try the nct6776 kernel module. Which obviously did not load automatically for whatever reason. To my surprise, I discovered that I could now read the fan speed in addition to the temperatures with coretemp module. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> nct6776-isa-0290 Adapter: ISA adapter Vcore: 880.00 mV (min = +0.00 V, max = +1.74 V) in1: 1.83 V (min = +0.00 V, max = +0.00 V) ALARM AVCC: 3.38 V (min = +2.98 V, max = +3.63 V) +3.3V: 3.36 V (min = +2.98 V, max = +3.63 V) in4: 984.00 mV (min = +0.00 V, max = +0.00 V) ALARM in5: 1.66 V (min = +0.00 V, max = +0.00 V) ALARM in6: 872.00 mV (min = +0.00 V, max = +0.00 V) ALARM 3VSB: 3.46 V (min = +2.98 V, max = +3.63 V) Vbat: 3.28 V (min = +2.70 V, max = +3.63 V) fan1: 0 RPM (min = 0 RPM) fan2: 1111 RPM (min = 0 RPM) fan3: 0 RPM (min = 0 RPM) fan4: 0 RPM (min = 0 RPM) fan5: 0 RPM (min = 0 RPM) SYSTIN: +33.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor = thermistor CPUTIN: +123.5°C (high = +80.0°C, hyst = +75.0°C) ALARM sensor = CPU diode AUXTIN: +39.5°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor PCH_CHIP_TEMP: +0.0°C PCH_CPU_TEMP: +0.0°C PCH_MCH_TEMP: +0.0°C pwm1: 64% (mode = dc) MANUAL CONTROL pwm2: 64% (mode = pwm) MANUAL CONTROL pwm3: 128% (mode = pwm) cpu0_vid: +0.000 V intrusion0: ALARM intrusion1: ALARM beep_enable: disabled coretemp-isa-0000 Adapter: ISA adapter Package id 0: +30.0°C (high = +80.0°C, crit = +100.0°C) Core 0: +28.0°C (high = +80.0°C, crit = +100.0°C) Core 1: +25.0°C (high = +80.0°C, crit = +100.0°C) Core 2: +26.0°C (high = +80.0°C, crit = +100.0°C) Core 3: +26.0°C (high = +80.0°C, crit = +100.0°C) <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< The temperature is pleasant, and even under load, the processor does not overheat, so I don't have that problem. The problem is that the CPU Fan could be quieter when idling. When running "pwmconfig" as root the CPU Fan go full speed. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Found the following devices: hwmon0 is nct6776 hwmon1 is coretemp Found the following PWM controls: hwmon0/pwm1 current value: 127 hwmon0/pwm2 current value: 127 hwmon0/pwm3 current value: 255 Giving the fans some time to reach full speed... Found the following fan sensors: hwmon0/fan1_input current speed: 0 ... skipping! hwmon0/fan2_input current speed: 2008 RPM hwmon0/fan3_input current speed: 0 ... skipping! hwmon0/fan4_input current speed: 0 ... skipping! hwmon0/fan5_input current speed: 0 ... skipping! Warning!!! This program will stop your fans, one at a time, for approximately 5 seconds each!!! This may cause your processor temperature to rise!!! If you do not want to do this hit control-C now!!! Hit return to continue: <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< After press return the CPU fan stopped as it should. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Testing pwm control hwmon0/pwm1 ... Manual control mode not supported, skipping. Testing pwm control hwmon0/pwm2 ... hwmon0/fan2_input ... speed was 2008 now 529 It appears that fan hwmon0/fan2_input is controlled by pwm hwmon0/pwm2 Would you like to generate a detailed correlation (y)? Press again return and the CPU Fan slow down like it should. PWM 255 FAN 2017 PWM 240 FAN 1942 PWM 225 FAN 1829 PWM 210 FAN 1724 PWM 195 FAN 1638 PWM 180 FAN 1525 PWM 165 FAN 1418 PWM 150 FAN 1313 PWM 135 FAN 1215 PWM 120 FAN 1086 PWM 105 FAN 958 PWM 90 FAN 813 PWM 75 FAN 701 PWM 60 FAN 568 PWM 45 FAN 518 PWM 30 FAN 510 PWM 28 FAN 512 PWM 26 FAN 505 PWM 24 FAN 505 PWM 22 FAN 506 PWM 20 FAN 506 PWM 18 FAN 513 PWM 16 FAN 510 PWM 14 FAN 512 PWM 12 FAN 506 PWM 10 FAN 506 PWM 8 FAN 506 PWM 6 FAN 505 PWM 4 FAN 513 PWM 2 FAN 510 PWM 0 FAN 513 Testing pwm control hwmon0/pwm3 ... hwmon0/fan2_input ... speed was 2008 now 2017 no correlation No correlations were detected. Select fan output to configure, or other action: 1) hwmon0/pwm2 3) Just quit 5) Show configuration 2) Change INTERVAL 4) Save and quit select (1-n): 3 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< I saved the config 4) but it contains just empty values. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> INTERVAL=10 DEVPATH= DEVNAME= FCTEMPS= FCFANS= MINTEMP= MAXTEMP= MINSTART= MINSTOP= <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Then i just tried to create a custom fancontrol config inspired by a Gentoo forum post [1] >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> INTERVAL=10 DEVPATH=hwmon0=devices/platform/nct6775.656 DEVNAME=hwmon0=nct6798 FCTEMPS=hwmon0/pwm3=hwmon0/temp1_input FCFANS= hwmon0/pwm3=hwmon0/fan2_input MINTEMP=hwmon0/pwm3=20 MAXTEMP=hwmon0/pwm3=60 MINSTART=hwmon0/pwm3=150 MINSTOP=hwmon0/pwm3=100 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< When I run fancontrol as root, I get the warning: "Device name of hwmon0 has changed" "Configuration appears to be outdated, please run pwmconfig again." I'm run fancontrol just after configure /etc/fancontrol and don't reboot so there can't be a change in device names. Did I configure fancontrol incorrectly? Is the problem with coreboot? The doc page say [2] "There is no automatic, OS-independent fan control. This is because the Super I/O hardware monitor can only obtain valid CPU temperature readings from the PECI agent, but the required driver doesn’t exist in coreboot. The |coretemp| driver can still be used for accurate CPU temperature readings from an OS." Did this changed with the nct6776 kernel driver? Or am I trying to do something that is currently impossible without changing the coreboot code? Best regards, mgeins [1] https://forums.gentoo.org/viewtopic-t-1164535-start-0.html [2] https://doc.coreboot.org/mainboard/asrock/h81m-hds.html _______________________________________________ coreboot mailing list -- [email protected] To unsubscribe send an email to [email protected]