Psutil: /sys/class/hwmon related files not found (psutil.sensors_temperatures)

[AdnanHodzic]

Platform

• OS: Ubuntu 19.10
• python version: 3.7.5
• psutil version: 5.5.1 (same problem on 5.6.7)

Bug description
When I run: print(psutil.sensors_temperatures()['coretemp'][0].current) or temperatures script.

Before getting proper output, I'll get following error:

python3 temperatures.py 
/usr/lib/python3/dist-packages/psutil/_pslinux.py:1223: RuntimeWarning: ignoring FileNotFoundError(2, 'No such file or directory') for file '/sys/class/hwmon/hwmon0/temp1_input'
  RuntimeWarning)
/usr/lib/python3/dist-packages/psutil/_pslinux.py:1223: RuntimeWarning: ignoring FileNotFoundError(2, 'No such file or directory') for file '/sys/class/hwmon/hwmon0/temp2_input'
  RuntimeWarning)
/usr/lib/python3/dist-packages/psutil/_pslinux.py:1223: RuntimeWarning: ignoring FileNotFoundError(2, 'No such file or directory') for file '/sys/class/hwmon/hwmon2/temp1_input'
  RuntimeWarning)
/usr/lib/python3/dist-packages/psutil/_pslinux.py:1223: RuntimeWarning: ignoring FileNotFoundError(2, 'No such file or directory') for file '/sys/class/hwmon/hwmon2/temp2_input'
  RuntimeWarning)
/usr/lib/python3/dist-packages/psutil/_pslinux.py:1223: RuntimeWarning: ignoring OSError(6, 'No such device or address') for file '/sys/class/hwmon/hwmon5/temp2_input'
  RuntimeWarning)
/usr/lib/python3/dist-packages/psutil/_pslinux.py:1223: RuntimeWarning: ignoring OSError(6, 'No such device or address') for file '/sys/class/hwmon/hwmon5/temp8_input'
  RuntimeWarning)
acpitz
    acpitz               57.0 °C (high = 128.0 °C, critical = 128.0 °C)

pch_cannonlake
    pch_cannonlake       53.0 °C (high = None °C, critical = None °C)

coretemp
    Package id 0         57.0 °C (high = 100.0 °C, critical = 100.0 °C)
    Core 0               55.0 °C (high = 100.0 °C, critical = 100.0 °C)
    Core 1               55.0 °C (high = 100.0 °C, critical = 100.0 °C)
    Core 2               57.0 °C (high = 100.0 °C, critical = 100.0 °C)
    Core 3               57.0 °C (high = 100.0 °C, critical = 100.0 °C)

thinkpad
    thinkpad             57.0 °C (high = None °C, critical = None °C)
    thinkpad             1.0 °C (high = None °C, critical = None °C)
    thinkpad             66.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)
    thinkpad             0.0 °C (high = None °C, critical = None °C)

iwlwifi
    iwlwifi              49.0 °C (high = None °C, critical = None °C)

Regular output on sensors is as follows:

sensors
iwlwifi-virtual-0
Adapter: Virtual device
temp1:        +51.0°C  

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +58.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +56.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +56.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +56.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +57.0°C  (high = +100.0°C, crit = +100.0°C)

BAT0-acpi-0
Adapter: ACPI interface
in0:         +17.45 V  

thinkpad-isa-0000
Adapter: ISA adapter
fan1:           0 RPM
temp1:        +59.0°C  
temp2:            N/A  
temp3:         +0.0°C  
temp4:         +0.0°C  
temp5:         +0.0°C  
temp6:         +0.0°C  
temp7:         +0.0°C  
temp8:            N/A  
temp9:         +0.0°C  
temp10:        +1.0°C  
temp11:       +66.0°C  
temp12:        +0.0°C  
temp13:        +0.0°C  
temp14:        +0.0°C  
temp15:        +0.0°C  
temp16:        +0.0°C  

pch_cannonlake-virtual-0
Adapter: Virtual device
temp1:        +53.0°C  

acpitz-acpi-0
Adapter: ACPI interface
temp1:        +59.0°C  (crit = +128.0°C)

I looked at other issues with similar problem, but nothing seems to resolve my issue. Please let me know if you have any idea how to resolve this.

[amanusk]

Related issue from s-tui https://github.com/amanusk/s-tui/issues/135
It appears the cause of the problem is a change to the /sys/class/hwmon/ directory and introduction of new sensors in new Linux kernels >= 5.3.

There are now some sub directories with /sys/class/hwmon/hwmon*/temp*_label, but no corresponding /sys/class/hwmon/hwmon*/temp*_input
Thus a runtime warning is emitted here: https://github.com/giampaolo/psutil/blob/253abf3fc61ccc3ab1031a9b430a7e99e2194107/psutil/_pslinux.py#L1227

Sometimes the actual readout is done from a different file, such as /sys/class/hwmon/hwmon1/in0_input, but I am not certain of the consistency of this.

[AdnanHodzic]

Right as it turns out it's an issue introduced with 5.3 kernel.

Until this issue is fixed, I'll resort to use:

import warnings
warnings.filterwarnings("ignore")

in my code to hide the warnings and get clean output.

[giampaolo]

I think it makes sense to avoid emitting the warning. I turned that into a debug message instead (can be enabled by setting PSUTIL_DEBUG=1 env var). The C extensions already rely on PSUTIL_DEBUG in many places. This was never documented though (it probably should).

[rravicha]

Right as it turns out it's an issue introduced with 5.3 kernel.

Until this issue is fixed, I'll resort to use:

import warnings
warnings.filterwarnings("ignore")

in my code to hide the warnings and get clean output.

Cool, That's precisely what I am looking for