Score:1

Ubuntu shutdown leads to Cold-Boot failure

ye flag

I am booting a new MinisForum PC with Ubuntu 20.04.04LTS, and have a 2nd SSD hosting Win10. If I shutdown the PC using Ubuntu, then any subsequent cold-boot, fails repeatedly (up to 10 times), before the PC finally starts up again.

A Cold-Boot failure is quickly detected, since the fan spins up when I press the power button, but do not spin-down as the Bios starts to run. If the fan stays at high speed for more than 15-seconds, then I know that the cold-boot has failed. Cold-Boot failure does not end up in a Bios screen, it's as if we never get to the Bios.

However, if I shutdown the same PC from Win10, then a cold-boot (into the Bios, Ubuntu or Win10) is always successful first-time. I should add that I can Restart the PC (warm-boot) using Ubuntu or Win10 without issue.

I don't need Win10 on this PC, it's only function is to ensure that I can boot the machine from cold. As such my Linux shutdown routine is to warm-boot the PC into Win10, and then shutdown from Win10.

What is Win10 doing upon shutdown (writing to Bios registers etc...), that Ubuntu is not?

Regards,

DJE666

ChanganAuto avatar
us flag
If what happens is exactly how you describe then there's no logical explanation (but I suspect there's more, or less, to it). In any case start by updating the firmware (UEFI "BIOS"), if available.
DJE666 avatar
ye flag
Hi ChanganAuto. The system behaves exactly as described. Win10 shutdown = good cold-boot, Ubuntu shutdown = bad cold-boot. There is no bios update.
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