https://bugs.kde.org/show_bug.cgi?id=522149

Ed <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REPORTED                    |RESOLVED
         Resolution|---                         |NOT A BUG

--- Comment #9 from Ed <[email protected]> ---
I found the root cause and this can be closed as a local hardware/topology
issue rather than a KWin bug.

One of my monitors was connected through an HDMI source-switching/splitter-type
device so I could switch between machines, and that same monitor also had
another direct cable/source path involved. In other words, my display topology
was more complicated than I realized. During cold boot, the GPU/KWin/KScreen
stack was likely seeing confusing or unstable monitor/EDID/source information
from that setup.

After simplifying/removing that switching path and correcting the monitor
cabling, the issue no longer appears to reproduce. The cold-boot display layout
now initializes correctly.

I apologize for the noise, and I sincerely appreciate the time spent looking at
this — especially the triage around whether this was distinct from the
logout/shutdown teardown issue, and the request to test Wayland. That helped me
narrow the problem down.

Thank you to Nate, Vlad, Xaver, David, and everyone else copied here. Please
close this as a local configuration/hardware issue / not a KWin bug.

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