I have the same problem 2.5 years after your post. Did you find a fix for
this issue?
I followed the following tutorials:
https://blockforums.org/topic/451-guide-to-installing-qbuntu-ubuntu-2004-focal-fossa-templatevm-in-qubes-release-404-rc1/
This usually is your screensaver failing to activate after an idle timeout.
It was mentioned on the other forum a few times already.
Not sure whether it's a Qubes bug, probably more a xrandr bug which affects the
security of Qubes users.
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I am running Qubes 4.1rc3 on a Librem 14 and I see a lot of
```
Process 30303 (xrandr) of user 1000 dumped core
```
in my journalctl.
This morning I have ten within a minute.
I just resumed the computer from sleep and connected a usb-c monitor.
Are anyone else seeing similar issues?
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