Re: PR kern/60140 assistance required, laptop boot issue (a weird one)

On 30/03/2026 21:29, Robert Elz wrote:
> I can't even begin to imagine what difference having the AC adaptor
> connected can possibly make at that stage (if it were reversed, and not
> having it connected was the problem, one could imagine battery problems
> or similar, but not when the issue is when it is connected).

The AC adapter will almost certainly have some form of communications 
with the laptop. This could be anything from a simple "I'm here" signal 
to a sophisticated bidirectional conversation where the laptop is told 
the AC adapter's model and S/N and the laptop signalling that it is 
indeed ready to receive power.

On a modern PC laptop I expect this to be managed by the ACPI subsystem.

If we are accessing ACPI very early then this might be the location of 
the problem?? I'm speculating a bit here.

Ngā mihi,
Lloyd