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Re: Bug (?) affecting dramatically laptop battery life introduced in the latest debian testing updates

On Mon, 27 Nov 2017 12:37:10 -0500
Cindy-Sue Causey <butterflybytes@gmail.com> wrote:

> On 11/27/17, Pietro Vischia <pietro.vischia@gmail.com> wrote:
> > Dear All,
> >
> > I apologize in advance if this is not the correct forum: I am
> > following the instructions at
> > https://www.debian.org/Bugs/Reporting.en.html in the case in which
> > the user is not sure of which package is affected.
> >
> > I have a Lenovo T460P, and with stretch I enjoyed a reasonable
> > battery life (~4 hours). At the beginning of November I switched to
> > buster, and things were still OK.
> >
> > Last week I made an upgrade as usual, and since reboot the battery
> > lasts half an hour to one hour tops, which led me to think that a
> > bug has been introduced in the latest updates.
> >
> > I am not sure of how to pinpoint which is the package responsible
> > for that, although I suspect it might be either the ACPI package or
> > the battery module of the kernel: could you perhaps please suggest
> > me the best way to pinpoint the culprit for producing a detailed
> > bug report?  
> Hi, Pietro.. I don't have a direct answer, but one thought occurred to
> me. Do you have a way to boot again from either of the other releases
> again to see if it goes back to your ~4 hour expectation?
> That's all I got, grin. It would have to be almost exactly the same as
> before. In other words, it's.... well, on second thought, I don't
> know.
> Can anyone present a test screnario where the power usage would be at
> least somewhat similar without having to undo a new installation? What
> I'm imagining is testing via a memory stick'ish or external hard drive
> situation. Not scientific, but it might yield something of possible
> use, anyway... Or not. :)
> Cindy :)

I'd suppose running both live images (buster/stretch) from a thumb
drive for debugging. Power consumption should be similar to SSD,
effort is minimal and it should be fairly easy to compare the results
from 'top' and 'ps axf' - and the actual battery life, of course.

Backup not found: (A)bort (R)etry (P)anic

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