systemd killing processes on monitor wakeup?

[Raman Gupta <rocketraman@xxxxxxxxx>]

I have a couple processes that have been consistently dying every time I wake up my monitors after the system has been idle. One is Slack Desktop and the other is IntelliJ IDEA. Plasma also crashes on every wakeup, which may or may not be related.

I used an eBPF program (killsnoop.py at https://github.com/iovisor/bcc/blob/master/tools/killsnoop.py) to trace where the signal to shut down these processes was coming from, and it appears that systemd is sending pretty much every active process signal 15 and then 18.

TIME      PID    COMM             SIG  TPID   RESULT

... on monitor wakeup ...

12:16:58  2551   systemd          15   2938613 0
12:16:58  2551   systemd          18   2938613 0
12:16:58  2551   systemd          15   2938814 0
12:16:58  2551   systemd          18   2938814 0
12:16:58  2551   systemd          15   2938832 0
12:16:58  2551   systemd          18   2938832 0
12:16:58  2551   systemd          15   2938978 0
12:16:58  2551   systemd          18   2938978 0
12:16:58  2551   systemd          15   2939432 0
12:16:58  2551   systemd          18   2939432 0
12:16:58  2551   systemd          15   2939899 0
12:16:58  2551   systemd          18   2939899 0
12:16:58  2551   systemd          15   2942192 0
12:16:58  2551   systemd          18   2942192 0

...

Process 2551 is the user process for systemd:

raman       2551       1  0 Jan07 ?        00:00:10 /usr/lib/systemd/systemd --user

This behavior is relatively new. What is going on here? I haven't found any other reports of this behavior anywhere else.

Regards,

Raman

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