1

Yes, I know that is an old chip.

Running a sensors-detect with all the optional tests yields nothing. My sensors refuse to read the temperature of the CPU. I know there is a working temperature sensor in there because I can see the correct temperature in the BIOS.

Does anyone know which kernel module I have to enable? Or how to find out without sensors-detect?

My CPU is a 6 core AMD Phenom II 1090T.

Just in case, here is the complete output of lsmod. sensors-detect loaded k10temp, which does not detect the CPU temperature.

Module                  Size  Used by
binfmt_misc            24576  1
dm_multipath           32768  0
scsi_dh_rdac           16384  0
scsi_dh_emc            16384  0
scsi_dh_alua           20480  0
snd_hda_codec_hdmi     61440  4
snd_hda_codec_realtek   126976  1
snd_hda_codec_generic    81920  1 snd_hda_codec_realtek
ledtrig_audio          16384  2 snd_hda_codec_generic,snd_hda_codec_realtek
snd_hda_intel          53248  0
snd_intel_dspcfg       28672  1 snd_hda_intel
snd_hda_codec         135168  4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
snd_hda_core           90112  5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
edac_mce_amd           32768  0
snd_hwdep              20480  1 snd_hda_codec
snd_pcm               106496  4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
joydev                 24576  0
input_leds             16384  0
ccp                    86016  0
snd_timer              36864  1 snd_pcm
snd                    90112  8 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm
kvm                   663552  0
soundcore              16384  1 snd
k10temp                16384  0
mac_hid                16384  0
sch_fq_codel           20480  2
nct6775                69632  0
hwmon_vid              16384  1 nct6775
ip_tables              32768  0
x_tables               40960  1 ip_tables
autofs4                45056  2
btrfs                1261568  0
zstd_compress         167936  1 btrfs
raid10                 57344  0
raid456               155648  0
async_raid6_recov      24576  1 raid456
async_memcpy           20480  2 raid456,async_raid6_recov
async_pq               24576  2 raid456,async_raid6_recov
async_xor              20480  3 async_pq,raid456,async_raid6_recov
async_tx               20480  5 async_pq,async_memcpy,async_xor,raid456,async_raid6_recov
xor                    24576  2 async_xor,btrfs
raid6_pq              114688  4 async_pq,btrfs,raid456,async_raid6_recov
libcrc32c              16384  2 btrfs,raid456
raid1                  45056  0
raid0                  24576  0
multipath              20480  0
linear                 20480  0
nouveau              1949696  1
mxm_wmi                16384  1 nouveau
wmi                    32768  2 mxm_wmi,nouveau
video                  49152  1 nouveau
i2c_algo_bit           16384  1 nouveau
ttm                   106496  1 nouveau
drm_kms_helper        184320  1 nouveau
pata_acpi              16384  0
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
hid_generic            16384  0
uas                    28672  1
fb_sys_fops            16384  1 drm_kms_helper
r8169                  90112  0
usbhid                 57344  0
realtek                24576  1
pata_atiixp            16384  2
usb_storage            77824  1 uas
drm                   491520  4 drm_kms_helper,ttm,nouveau
i2c_piix4              28672  0
hid                   131072  2 usbhid,hid_generic
ahci                   40960  2
libahci                32768  1 ahci

For good measure, I also present the current output of sensors:

k10temp-pci-00c3
Adapter: PCI adapter
temp1:        +36.5°C  (high = +70.0°C)

nouveau-pci-0100
Adapter: PCI adapter
GPU core:    900.00 mV (min =  +0.85 V, max =  +1.05 V)
temp1:        +52.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

nct6776-isa-0290
Adapter: ISA adapter
Vcore:           1.20 V  (min =  +0.00 V, max =  +1.74 V)
in1:           192.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
AVCC:            3.30 V  (min =  +2.98 V, max =  +3.63 V)
+3.3V:           3.28 V  (min =  +2.98 V, max =  +3.63 V)
in4:           528.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in5:             1.67 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in6:             1.83 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
3VSB:            3.44 V  (min =  +2.98 V, max =  +3.63 V)
Vbat:            3.39 V  (min =  +2.70 V, max =  +3.63 V)
fan1:           865 RPM  (min =    0 RPM)
fan2:          3890 RPM  (min =    0 RPM)
fan3:             0 RPM  (min =    0 RPM)
fan4:             0 RPM  (min =    0 RPM)
fan5:             0 RPM  (min =    0 RPM)
SYSTIN:         +40.0°C  (high =  +0.0°C, hyst =  +0.0°C)  ALARM  sensor = thermistor
CPUTIN:         +45.0°C  (high = +80.0°C, hyst = +75.0°C)  sensor = thermistor
AUXTIN:         -26.0°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  
intrusion0:    OK
intrusion1:    OK
beep_enable:   disabled

The nouveau entry is of course a graphics card.

1 Answer 1

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k10temp is the CPU temperature sensor. With older AMD CPUs you get only one value, which isn't even "real" temperature:

For CPUs older than Family 17h, there is one temperature measurement value, available as temp1_input in sysfs. It is measured in degrees Celsius with a resolution of 1/8th degree. Please note that it is defined as a relative value; to quote the AMD manual:

Tctl is the processor temperature control value, used by the platform to control cooling systems. Tctl is a non-physical temperature on an arbitrary scale measured in degrees. It does not represent an actual physical temperature like die or case temperature. Instead, it specifies the processor temperature relative to the point at which the system must supply the maximum cooling for the processor's specified maximum case temperature and maximum thermal power dissipation.

1
  • Thank you, that is very helpful! Followup question: The man page states that this value is available as "temp1_input", but my "temp1_input" maps to "SYSTIN", while "CPUTIN" has the value of "temp2_input" (according to sensors -u). Which one is correct? Bear in mind that I know absolutely nothing about sensors. Jun 18, 2021 at 15:56

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