Re: How to investigate sudden shutdown?
On Thu 15 Dec 2022 at 16:12:32 (+0100), Tobias Diekershoff wrote:
>
> > > perhaps someone of you can help me with tool / log file I have not investigated
> > > so far. I have a Thinkpad with Debian Bullseye on it, running KDE/Plasma as main
> > > desktop environment and from time to time it just turn off without prior
> > > indication to do so.
> >
> > How old is the machine?
>
> About 5 years
Ridiculously considered quite old for a laptop (mine are 5, 9 and 18).
> > Spinning rust or SSD?
>
> SSD
>
> > How have the battery and power handling been performing recently?
>
> Well, no problems there.
>
> > What type of connector is used for the AC power adapter?
>
> It's a German Schuko connector.
Actually I meant the other end. Mine have three different types. The
newest has USB-C. They aren't the most reliably mechanically seated.
That machine was retired from business work on account of the HDMI
socket being unreliable, but all the sockets are as bad now.
The middle one got its power through the pseudo-USB-A connector
used for a while by Lenovo. It now has to run with the weight of
the machine trapping the power cable underneath, keeping just
the right torsion on the connector.
The only one that has a reliable connector is the oldest, which uses
the age-old coaxial barrel connector. The battery is dead, but this
is the only one of the three laptops that can be used on the lap.
> > > It it not particular warm before and journalctl / dmsg logs are looking
> > > unsuspicious around these sudden shutdowns for me.
> > >
> > > Any pointer what else could be investigated (and I do realize that these are
> > > very vague symptoms) would be appreciated!
> >
> > Do shutdowns occur only on AC, or only on battery, or both?
>
> Both, though the notebook runs on AC most of the time.
>
> > Do the shutdowns coincide with moments of high load?
>
> Not that I remember.
>
> > Do they occur when you adjust the angle of the screen?
>
> No.
My deceased 2008 Dell would sometimes power off when the screen
was adjusted. Eventually the screen would blank a few seconds
after power-on, unless the machine had been left for a week or so
without power, when the screen might stay lit for a minute or two.
> > Do they occur when the machine is mechanically undisturbed,
> > ie when it's sitting on a table?
>
> Yes
Not much of a hint, from these replies, of what's causing your
problem. (I'm assuming that the symptom is sudden total power
loss, just like pulling the power plug out of a desktop PC.)
Cheers,
David.
Reply to: