Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye

From	Kobus van Schoor <v.schoor.kobus@gmail.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye
Date	2021-08-21 19:00 +0200
Message-ID	<COCvD-6Cw-1@gated-at.bofh.it> (permalink)
References	<COAtP-5mW-3@gated-at.bofh.it> <COBpW-5Vx-11@gated-at.bofh.it> <COBSW-6nh-1@gated-at.bofh.it> <COAtP-5mW-3@gated-at.bofh.it> <COBSW-6nh-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Thanks Diederik, that did the trick! After setting "Runtime PM for PCI
Device Intel Corporation Sunrise Point-LP CSME HECI #1" to "Bad" the
issue went away :) I can just set it to "Bad", but it was running fine
on "Good" on the previous kernels, so I guess there is still some
regression here (and I don't know what this effect will now have on
battery life). How should I proceed, as the bug's nature has now
changed?

On Sat, 2021-08-21 at 18:08 +0200, Diederik de Haas wrote:
> On zaterdag 21 augustus 2021 17:38:51 CEST Kobus van Schoor wrote:
> > Enabling/disabling it however has no effect
> 
> It was worth a shot ;-)
> 
> > (it was set to "Bad" anyway).
> 
> I don't expect much from it, but you could set them all to "Bad". If
> that 
> still doesn't make a difference, then you can fully rule out energy
> savings.
> With 'lsusb -t' you can see that a/your device has a parent and it
> may be that 
> power savings on a/the parent has an effect.
> I don't expect it to make a difference, but otoh it's easy to try
> out.

Thread

Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye Kobus van Schoor <v.schoor.kobus@gmail.com> - 2021-08-21 16:50 +0200
  Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye Diederik de Haas <didi.debian@cknow.org> - 2021-08-21 17:10 +0200
    Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye Kobus van Schoor <v.schoor.kobus@gmail.com> - 2021-08-21 17:50 +0200
      Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye Diederik de Haas <didi.debian@cknow.org> - 2021-08-21 18:20 +0200
        Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye Kobus van Schoor <v.schoor.kobus@gmail.com> - 2021-08-21 19:00 +0200
          Bug#992637: Dropped packets/high latency on USB bus when using USB oscilloscope in bullseye Diederik de Haas <didi.debian@cknow.org> - 2021-08-21 20:10 +0200
            Bug#992637: Too aggressive energy savings on kernel 5.10 cause some USB devices to malfunction Diederik de Haas <didi.debian@cknow.org> - 2021-08-21 20:20 +0200
  Processed: Re: Bug#992637: Dropped packets/high latency on USB  bus when using USB oscilloscope in bullseye "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-08-21 20:10 +0200
  Processed: Re: Bug#992637: Too aggressive energy savings on  kernel 5.10 cause some USB devices to malfunction "Debian Bug Tracking System" <owner@bugs.debian.org> - 2021-08-21 20:20 +0200
  Bug#992637: same here Thomas Braun <thomas@akwgegner.de> - 2022-07-08 13:20 +0200

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