[kde] [Bug 465067] New: Main display disables itself if monitor is turned off for some hours

[le_dino]

https://bugs.kde.org/show_bug.cgi?id=465067

            Bug ID: 465067
           Summary: Main display disables itself if monitor is turned off
                    for some hours
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: palletonde at gmail.com
  Target Milestone: ---

SUMMARY
I have a multi monitor setup and a necessity to keep my computer running
overnight, I have figured the main display is disabled when I turn on the
monitors the next day.
This behavior is inconsistent and happens about 3/4 of the times.

STEPS TO REPRODUCE
1. Physically turn off all monitors
2. Leave the computer running for some hours (lowest detected was after about
3, but more likely to happen if left off for a sleep worth amount of time)

OBSERVED RESULT
The main display ends up disabled, the screen stays black and gives no signal.
Sometimes there's random misbehavior such as the taskbar having moved to
another display, or the wallpapers shifted, but otherwise the other displays
are unaffected in their location.

EXPECTED RESULT
All displays would turn on as normal and no weird behavior happens

SOFTWARE/OS VERSIONS
Operating System: EndeavourOS
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 6.1.8-arch1-1 (64-bit)
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 31,3 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2

ADDITIONAL INFORMATION
• I have a 4 monitors setup: The main one is plugged via DP, as well as 2 of
the others. The fourth one is a drawing tablet and is plugged via HDMI
• The main monitor is 144hz, one is 75, the other & the tablet are 60
• In the nvidia settings, I only set the main monitor to force full composition
pipeline (for refresh rate and tearing)
• Every setting within KDE about screen energy saving is disabled, I do not
wish to have my displays automatically switching off
• When the main display ends disabled, I turn it on and adjust it back via
nvidia x server settings, it will be necessary to reconfigure resolution,
refresh rate, location, composition pipeline and so on
• The display settings in KDE seem to weirdly behave when attempting to adjust
the disabled monitor (moving its location appears to get stuck and things like
that). It works correctly after the monitor has been reconfigured via nvidia x
server settings
• This only began happening since my relatively recent reinstall of the current
release of EndeavourOS, it never happened before on the previous release I had
installed last march.
• The same has happened about once or twice as I used alternate output of my
main display (HDMI opposed to DP) to play on my nintendo switch for a few
hours, suggesting this occurs when there's no signal for an extended period of
time
• It doesn't seem to happen if the monitor is off for a short amount of time

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