Here are the Linux messages.
** Attachment added: "Linux messages with `acpi=off debug` on the Linux command
line"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1883019/+attachment/5382802/+files/morley-acpi-off.txt
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1883019
Title:
Dell Precision 3540: Starting with acpi=off does not power off
Status in linux package in Ubuntu:
Confirmed
Bug description:
With Ubuntu 20.04 (and 18.04) Starting the Dell Precision with
`acpi=off` (to debug power cable issue) powering of the system, it
halts but does not power off.
[1]: https://bugs.launchpad.net/bugs/1661741
[2]: https://bugs.launchpad.net/dell-sputnik/+bug/1871491
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