The case of the computer that would not reboot

Tools
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1

I recently started to have problems with my workstation rebooting after updates. It would stop with a single cursor on the screen and not even display the BIOS splash. After messing around a bit I could usually get it to boot again. Eventually suspected things started working after it cooled down a bit.

Blew out the fans/heatsinks with an air compressor, and seems to be working fine now. Need to take @jeffsFOM advice and blow dust out of all computers every time the time changes – twice/year.

This is a good monitoring application – something should have known the workstation was running hotter long before I did – time to eat some more dogfood …

2

The command line application “sensors” is your friend here:
~$ sensors
iwlwifi_1-virtual-0
Adapter: Virtual device
temp1: +37.0°C

nvme-pci-0500
Adapter: PCI adapter
Composite: +32.9°C (low = -273.1°C, high = +81.8°C)
(crit = +84.8°C)
Sensor 1: +32.9°C (low = -273.1°C, high = +65261.8°C)
Sensor 2: +32.9°C (low = -273.1°C, high = +65261.8°C)

BAT1-acpi-0
Adapter: ACPI interface
in0: 16.67 V
curr1: 0.00 A

coretemp-isa-0000
Adapter: ISA adapter
Package id 0: +41.0°C (high = +100.0°C, crit = +100.0°C)
Core 0: +40.0°C (high = +100.0°C, crit = +100.0°C)
Core 1: +41.0°C (high = +100.0°C, crit = +100.0°C)
Core 2: +39.0°C (high = +100.0°C, crit = +100.0°C)
Core 3: +39.0°C (high = +100.0°C, crit = +100.0°C)
Core 4: +41.0°C (high = +100.0°C, crit = +100.0°C)
Core 5: +39.0°C (high = +100.0°C, crit = +100.0°C)
Core 6: +39.0°C (high = +100.0°C, crit = +100.0°C)
Core 7: +39.0°C (high = +100.0°C, crit = +100.0°C)

pch_cometlake-virtual-0
Adapter: Virtual device
temp1: +42.0°C

nvme-pci-0600
Adapter: PCI adapter
Composite: +38.9°C (low = -5.2°C, high = +83.8°C)
(crit = +87.8°C)

acpitz-acpi-0
Adapter: ACPI interface
temp1: +43.0°C