https://bugs.kde.org/show_bug.cgi?id=488270

--- Comment #24 from Elabajaba <ea.bo...@hotmail.com> ---
(In reply to Zamundaaa from comment #23)
> (In reply to docw2732 from comment #17)
> > Created attachment 176730 [details]
> > edid2
> Wow, this is an especially stupid case. The EDID contains *two* serial
> numbers, one as a string, and one as a number. The number is the same in the
> two displays (and this one is currently used for identifying screens in
> KWin!) but the serial number string is different.
> We can improve the situation a bit beyond fixing the bug by adding a version
> 2 identifier that contains the serial number string in addition to the
> number. In hindsight I should've expected display manufacturers to mess
> things up this bad...
> 
> (In reply to Elabajaba from comment #18)
> > Created attachment 176731 [details]
> > Clean pre-bug kwinoutputconfig.json
> Okay, that does look like the exact same situation - same serial number,
> different edid hash.
> 
> Thanks for the EDIDs, this should help a lot in fixing it.

In my case this isn't really a bug. I've got 2 cables going into the same LG CX
TV because I dual boot Windows and use HDMI 2.1 on Windows, but have to use a
DP->HDMI 2.1 adapter on Linux because AMD gpus don't support HDMI 2.1 on Linux
https://gitlab.freedesktop.org/drm/amd/-/issues/1417 (and I can't just use the
adapter for both because the adapter firmware that gives 4k120 4:4:4 + HDR +
VRR on Linux doesn't work on Windows 🙃).

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