I'm on Ubuntu Desktop 20.04 with a LENOVO ThinkPad L13 Yoga.
For a few days, Ubuntu has been crashing and turning off suddenly.
Looking at logs with journalctl shows that the problem is overheating,
Jun 30 13:13:18 siavash-fra thermald[1184]: critical temp reached
Jun 30 13:13:19 siavash-fra thermald[1184]: critical temp reached
-- Reboot --
although there's no sign of overheating. So I monitored the temperature with sensors. Here are the values after boot with no task running:
ucsi_source_psy_USBC000:001-isa-0000
Adapter: ISA adapter
in0: 0.00 V (min = +0.00 V, max = +0.00 V)
curr1: 0.00 A (max = +0.00 A)
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +42.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +39.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +42.0°C (high = +100.0°C, crit = +100.0°C)
Core 2: +38.0°C (high = +100.0°C, crit = +100.0°C)
Core 3: +41.0°C (high = +100.0°C, crit = +100.0°C)
BAT0-acpi-0
Adapter: ACPI interface
in0: 16.93 V
ucsi_source_psy_USBC000:002-isa-0000
Adapter: ISA adapter
in0: 5.00 V (min = +5.00 V, max = +15.00 V)
curr1: 3.00 A (max = +3.00 A)
iwlwifi_1-virtual-0
Adapter: Virtual device
temp1: +49.0°C
thinkpad-isa-0000
Adapter: ISA adapter
fan1: 0 RPM
temp1: +1.0°C
temp2: +1.0°C
temp3: +4.0°C
temp4: +60.0°C
temp5: +63.0°C
temp6: +63.0°C
temp7: +16.0°C
temp8: +66.0°C
temp9: +64.0°C
temp10: +3.0°C
temp11: -80.0°C
temp12: +0.0°C
temp13: +0.0°C
temp14: +0.0°C
temp15: +66.0°C
temp16: +0.0°C
nvme-pci-0300
Adapter: PCI adapter
Composite: +37.9°C (low = -20.1°C, high = +77.8°C)
(crit = +81.8°C)
Sensor 1: +37.9°C (low = -273.1°C, high = +65261.8°C)
acpitz-acpi-0
Adapter: ACPI interface
temp1: +40.0°C (crit = +95.0°C)
But when I run a python script for example, in less than two seconds the temp reaches critical and it crashes:
iwlwifi_1-virtual-0
Adapter: Virtual device
temp1: +50.0°C
coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +96.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +73.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +73.0°C (high = +100.0°C, crit = +100.0°C)
Core 2: +71.0°C (high = +100.0°C, crit = +100.0°C)
Core 3: +96.0°C (high = +100.0°C, crit = +100.0°C)
BAT0-acpi-0
Adapter: ACPI interface
in0: 16.93 V
ucsi_source_psy_USBC000:002-isa-0000
Adapter: ISA adapter
in0: 5.00 V (min = +5.00 V, max = +15.00 V)
curr1: 3.00 A (max = +3.00 A)
ucsi_source_psy_USBC000:001-isa-0000
Adapter: ISA adapter
in0: 0.00 V (min = +0.00 V, max = +0.00 V)
curr1: 0.00 A (max = +0.00 A)
thinkpad-isa-0000
Adapter: ISA adapter
fan1: 0 RPM
temp1: +1.0°C
temp2: +1.0°C
temp3: +4.0°C
temp4: +60.0°C
temp5: +63.0°C
temp6: +63.0°C
temp7: +16.0°C
temp8: +66.0°C
temp9: +64.0°C
temp10: +3.0°C
temp11: -80.0°C
temp12: +0.0°C
temp13: +0.0°C
temp14: +0.0°C
temp15: +66.0°C
temp16: +0.0°C
nvme-pci-0300
Adapter: PCI adapter
Composite: +39.9°C (low = -20.1°C, high = +77.8°C)
(crit = +81.8°C)
Sensor 1: +39.9°C (low = -273.1°C, high = +65261.8°C)
acpitz-acpi-0
Adapter: ACPI interface
temp1: +96.0°C (crit = +95.0°C)
It actually doesn't feel even warm. Can this be a false signal? Can the temp reach so high in less than 2 seconds?
I use windows alongside and I don't have overheating or crashes in there. Btw, it shows fan1: 0 RPM but I can hear and feel the fan is working.
