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From: Terrance Hendrik <terrance.hendrik@gmail.com>
Newsgroups: linux.debian.bugs.dist,linux.debian.kernel
Subject: Bug#1068020: Background process seemingly paused
Date: Fri, 29 Mar 2024 20:00:01 +0100
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Package: linux-image-amd64
Version: 6.6.15-2

Debian testing/trixie, kernel 6.6.15-2 (2024-02-04)
xfce

Case 1:

Start a command that runs for a long time, say `ffmpeg`. switch to other
programs, i.e. web browser or other terminal windows, and keep using the
computer. After a while, ffmpeg cpu usage drops to 0%, switch back to
ffmpeg's terminal window, it will go back to running.

Case 2:

start ffmpeg, leave the computer untouched, then screensaver runs, then the
display turns off. No suspend, no hibernate, no shutdown. after a while,
wake up display, unlock session, ffmpeg is using 0% CPU. switch back to its
terminal window, it resumes.


I am not sure which package is causing this. This happened long before
6.6.15 kernels.

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<div dir=3D"ltr">Package: linux-image-amd64<div>Version: 6.6.15-2<br></div>=
<div><br></div><div>Debian testing/trixie, kernel 6.6.15-2 (2024-02-04) <br=
></div><div>xfce <br></div><div><br></div><div>Case 1:</div><div><br></div>=
<div>Start a command that runs for a long time, say `ffmpeg`. switch to oth=
er programs, i.e. web browser or other terminal windows, and keep using the=
 computer. After a while, ffmpeg cpu usage drops to 0%, switch back to ffmp=
eg&#39;s terminal window, it will go back to running.=C2=A0</div><div><br><=
/div><div>Case 2:=C2=A0</div><div><br></div><div>start ffmpeg, leave the co=
mputer untouched, then screensaver runs, then the display turns off. No sus=
pend, no hibernate, no shutdown. after a while, wake up display, unlock ses=
sion, ffmpeg is using 0% CPU. switch back to its terminal window, it resume=
s.</div><div><br></div><div><br></div><div>I am not sure which package is c=
ausing this. This happened long before 6.6.15 kernels.<br></div><pre></pre>=
</div>

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