Dell T20 doesn't stay shut off, auto restart after shut down

[flashdrive]

Hello,

what might be the reason?

If I do shut down the system regardless in the WebUI or with the power button:

the shutdown will be done, NIC LEDs go off briefly, be turned on after 1 second and the T20 will boot again.

The only time I managed it to stay shut down was to disconnect the power cable and re-attach it. (UEFI after power loss = stay off)


TrueNAS-SCALE-22.12.1 installed on SATA SSD

Power and LAN cable connected to T20, nothing else


SATA HDD for storage

T20 UEFI:

Disable Deep Sleep
Enable Wake On LAN




old thread of another system

SOLVED - PC / system doesn't stay shut down, auto switch on

I should've checked your hardware. By any chance, are you using any overclocking features in your BIOS? Please disable all overclocking. Also run your memory only at JEDEC timings, and disable any XMP settings. Likewise, disable the Rapid Start and Smart Connect features.

www.truenas.com

 

[Samuel Tai]

Check your BIOS settings. Once the shutdown occurs, the BIOS is in control, and in these cases, is usually configured to automatically restart.

 

[flashdrive]

@Samuel Tai

I tried many combinations in the BIEO / UEFI to no avail.

Any hints what this might cause?

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I will try the hard BIOS reset

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[flashdrive]

it still auto starts even after Hard BIOS reset

the only time I got it to stay off was after disconnecting all the drives and long press the physical power button

short pressing the button will result in a shutdown and restart after 3 seconds

 

[Samuel Tai]

Here’s the manual for the T20 BIOS.

Dell PowerEdge T20 Owner's Manual | Dell US

www.dell.com

In particular, check the setting for AC Recovery under Power Management on your system.

 

[flashdrive]

I have got it to work...

Dell T20 doesn't stay shut off, auto restart after shut down | DELL Technologies

Hello,what might be the reason?If I do shut down the system regardless in the WebUI or with the power button:the shutdown will be done, NIC LEDs go off briefly, be turned on after 1 second and the ...

www.dell.com

 

[flashdrive]

BIOS - WoL enabled is the culprit

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Moin zusammen, habe heute angefangen Proxmox 6.1.1 zu installieren. Es handelt sich um einen Dell T20 in Xeon Ausstattung. ISO runtergeladen und schnell durchgeklickt ... funzt. Wenn ich den Rechner jedoch herunterfahre (per Web Oberfläche, Kommandozeile oder Schalter), startet der Rechner...

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