Dev1 Galaxy Forum / Unintended reboot

Re: Unintended reboot

dummy@example.com (Altoid) — Thu, 04 Jun 2026 11:11:33 +0000

Hello:

... Dell 9020 reboots on every shutdown unless I explicitly hit the power button after shutdown ...
I have had a similar issue with my Sun U24 WS, fortunately it is not at every shutdown, just when the %$#"¿ crap BIOS feels like it.

I have found that it occurs when there are sharp changes in ambient temperature between booting and shutting down due to a badly written BIOS + faulty/wrong on-board sensor spec, so it is an issue I decided to ignore.

That said, yours seems to be a well known issue with that Dell rig.
A quick web search with the unsolicited Google IA intervention (?) brought up this*:

Google search wrote:

If your Dell OptiPlex 9020 is randomly rebooting on Linux, it is usually triggered by a kernel panic upon hardware conflict, failing storage, or power supply issues.

* to be taken with a few grains of salt. 8^°

See here.

If sudo halt works, you may want to write up a script to shut it down via sudo halt && sudo shutdown -now.
Check the respective man files for the proper syntax.

Best,

Re: Unintended reboot

dummy@example.com (pcalvert) — Thu, 04 Jun 2026 09:38:37 +0000

What is the output produced by this command?:

apt show intel-microcode

Re: Unintended reboot

dummy@example.com (kapqa) — Thu, 04 Jun 2026 09:38:10 +0000

did you try to disable "fast boot"?
did you try to set BIOS do "default settings"?
is it a laptop or deksotp pc? ~ modern latop can have strange behaviours , also "thanks" to "internal" batteries.

EDIT: had a similar issue on a desktop if remember correctly; in my case it was the mouse that was causing "wakeup" calls unintendedly and made the desktop turn-on even if supposedly it wws turned off; changing to another mouse solvedt e issue.

Unintended reboot

dummy@example.com (Red_Fir) — Thu, 04 Jun 2026 01:53:21 +0000

My Dell 9020 reboots on every shutdown unless I explicitly hit the power button after shutdown since install of Devuan 6.
This is a multiboot machine running Artix an Salix, too.
It did not do this with Devuan 5, nor does it do it with the other distro's
I have gone through the bios and ensured every restart, or timed boot is disabled.
I usually shut it down during the week, and leave it running over the weekend to save wear on a hard drive

{sudo halt} will shut it down cleanly

Any ideas on how to address this?