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



Control: retitle -1 Too aggressive energy savings on kernel 5.10 cause some devices to malfunction

On zaterdag 21 augustus 2021 18:48:31 CEST Kobus van Schoor wrote:
> 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 :)

Great! Now you've narrowed down the issue and have a workaround.

> 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

Agreed, this is (or seems like) a regression.

> (and I don't know what this effect will now have on battery life). 

"Bad" should consume a bit more energy, but you can still keep most on "Good",
so you should still have improved battery life.

> How should I proceed, as the bug's nature has now changed?

I don't know that, hopefully more knowledgeable people will chime in.
I have retitled this bug so it better reflects the problem.
AFAICT, it's still a kernel issue. If not, someone else will probably reassign.

Cheers,
  Diederik

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