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Bug#708158: marked as done (base: Desktop slows to be unusable when power cord is removed for a while, then plugged in again. kworker)

Your message dated Sat, 16 Oct 2021 01:59:29 -0700 (PDT)
with message-id <616a9471.1c69fb81.51a43.320c@mx.google.com>
and subject line Closing this bug (BTS maintenance for src:linux bugs)
has caused the Debian Bug report #708158,
regarding base: Desktop slows to be unusable when power cord is removed for a while, then plugged in again. kworker
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
708158: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=708158
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: base
Severity: important

Dear Maintainer,
*** Please consider answering these questions, where appropriate ***

   * What led up to the situation?

New Debian 7 install yesterday, Dell lattitude E5420 laptop, serial number 19640672489.  No nonstandard hardware.

This is a very common/generic laptop, one of the standard models used at Sheffield University.

Running fine all day, then unplugged power to go to a 2 hour meeting on battery.   Just got back from meeting and plugged in again, battery level is 59pc.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
When I plug the power cord back in (so the computer goes to charging) the desktop becomes unusably sluggish, the mouse and keyboard take about a second to respond to each input.   Unplugging the cord makes everything work again (but then the battery will run down!)


   * What was the outcome of this action?
As well as sluggishness I can see several kworkers hogging the CPU in top.  The sluggishness makes the computer completly unusable when it is plugged back in.
  (I think it vanishes once the battery has fully recharged though)

   * What outcome did you expect instead?
Thought Wheezy would have fixed this -- it's been a known issue in Ubunu for several years now and was a major reason for moving to Deibian,
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/998204
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/887793
http://ubuntuforums.org/showthread.php?t=1921292

I have been trying the suggested fix from the Ubuntu forums for two years with no success.   Some posters have said that the bug involves ACPI power management but I'm not sure if this is actually where it comes from.

(Sorry for sending via gmail, I did this report in reportbug but our uni seems to have disabled SMTP since it switched us to corporate gmail.)

--
Dr Charles Fox www.5m.org.uk
Researcher, Department of Computer Science
University of Sheffield, UK

--- End Message ---
--- Begin Message --- 
Hi

This bug was filed for a very old kernel or the bug is old itself
without resolution.

If you can reproduce it with

- the current version in unstable/testing
- the latest kernel from backports

please reopen the bug, see https://www.debian.org/Bugs/server-control
for details.

Regards,
Salvatore

--- End Message ---
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