On Fri, Nov 22, 2024 at 1:48 PM David Wright <deb...@lionunicorn.co.uk> wrote:
>
> On Thu 21 Nov 2024 at 22:57:35 (-0800), Michael Paoli wrote:
>
> > remove power (and it goes down cold - laptop battery no longer holds
> > charge and has been that way for many years now - cannot withstand so
> > much as even a full second of power interruption).
>
> Yes, I have three laptops like that. And after a period of
> non-connection/use, the BIOS settings on one of them were also
> lost, eg the date/time and administrative password.
>
> > what it shows in the logs - about all I've been able to find is this:
> > but without any more details as to what's triggering it or how:
> > ACPI: PM: Preparing to enter system sleep state S3
> > That's found in the /var/log/{kern.log,syslog}* files
> > *haven't tried all manner of Magic SysRq keys, as I'm not aware any
> > which would unblank the screen and/or resume from any manner of
> > sleep/suspend/hibernate
>
> Have you checked the BIOS settings? Here for example is one PC's diary
> record of me reconfiguring its BIOS when I acquired the machine.
>
> Power Management
>
> AC Recovery Power Off
> Auto On Time disabled
> Auto On Time 13:58 (ie PM)
> Deep Sleep Control Enabled in S4 and S5 → Disabled
> Fan Control Override disabled
> USB Wake Support enabled → disabled
> Wake on LAN/WLAN disabled → LAN Only
> Block Sleep disabled → Block Sleep (S3 State)
> Intel(R) Smart Connect Technology disabled
++.
I think S3, S4 and S5 are the important ones. It is actually nice to
see them listed like that in the UEFI menu.
Jeff
