I faced the same problem (wanting to monitor fan2, but showed the value of AVCC in Volts) in Bullseye.
Super I/O chip in Bullseye needs following module: nct6775 instead of formerly w83627ehf, while "sensors-detect" still reports the old module (address 0xa00, driver `w83627ehf') - should be fixed as well. In Buster I was lucky to get it right with this lines in ~/.config/xfce4/panel/xfce4-sensors-plugin-31.rc: [Chip2_Feature10] Id=-1 Address=10 Name=CPU-Fan Color=#00B000 Show=true Min=248,00 Max=3500,00 However in Bullseye I had no success even after hours to fiddle around. Finally, before reporting the bug, I checked with xfce4-sensors-plugin 1.3.92-1 from experimental and can confirm that this resolves the problem for me. To complete the information, here the output of "sensors" in Bullseye: $ sensors coretemp-isa-0000 Adapter: ISA adapter Package id 0: +39.0°C (high = +85.0°C, crit = +105.0°C) Core 0: +37.0°C (high = +85.0°C, crit = +105.0°C) Core 1: +33.0°C (high = +85.0°C, crit = +105.0°C) Core 2: +35.0°C (high = +85.0°C, crit = +105.0°C) Core 3: +39.0°C (high = +85.0°C, crit = +105.0°C) acpitz-acpi-0 Adapter: ACPI interface temp1: +27.8°C (crit = +106.0°C) temp2: +29.8°C (crit = +106.0°C) nct6775-isa-0a00 Adapter: ISA adapter Vcore: 896.00 mV (min = +0.00 V, max = +1.74 V) in1: 768.00 mV (min = +0.00 V, max = +0.00 V) ALARM AVCC: 3.39 V (min = +2.98 V, max = +3.63 V) +3.3V: 3.41 V (min = +2.98 V, max = +3.63 V) in4: 1.26 V (min = +0.00 V, max = +0.00 V) ALARM in5: 752.00 mV (min = +0.00 V, max = +0.00 V) ALARM in6: 1.08 V (min = +0.00 V, max = +0.00 V) ALARM 3VSB: 3.34 V (min = +2.98 V, max = +3.63 V) Vbat: 3.30 V (min = +2.70 V, max = +3.63 V) fan1: 270 RPM (min = 0 RPM, div = 64) fan2: 329 RPM (min = 0 RPM, div = 64) fan3: 397 RPM (min = 0 RPM, div = 64) fan4: 0 RPM (div = 128) SYSTIN: +34.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor = CPU diode CPUTIN: +39.5°C (high = +80.0°C, hyst = +75.0°C) sensor = CPU diode AUXTIN: +127.0°C (high = +80.0°C, hyst = +75.0°C) sensor = CPU diode PECI Agent 0: +38.5°C (high = +80.0°C, hyst = +75.0°C) (crit = +105.0°C) PCH_CHIP_TEMP: +65.0°C (high = +80.0°C, hyst = +75.0°C) PECI Agent 1: +0.0°C (high = +80.0°C, hyst = +75.0°C) (crit = +72.0°C) PCH_CPU_TEMP: +0.0°C cpu0_vid: +0.000 V intrusion0: ALARM beep_enable: disabled My guess for the problem is that some counter flips over at more than 8 sensors per adapter, so the value of line 2 (3.39V) is taken as output for sensor in line 10 (fan2) in the sample above. This way also the naming from line 10 was asigned to sensor 2 (double fan2 enties). The working entry in ~/.config/xfce4/panel/xfce4-sensors-plugin-31.rc now is like this: [Chip2_Feature10] Address=10 Name=CPU-Fan Color=#00B000 Show=true Min=301,00 Max=3500,00 Regards, Alf