[kde] [Bug 468904] New: External monitors connected to dGPU (NVIDIA) no longer working after upgrading to kde-plasma/plasma-meta-5.27.4

[Niels]

https://bugs.kde.org/show_bug.cgi?id=468904

            Bug ID: 468904
           Summary: External monitors connected to dGPU (NVIDIA) no longer
                    working after upgrading to
                    kde-plasma/plasma-meta-5.27.4
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: nvaert1986 at hotmail.com
  Target Milestone: ---

SUMMARY
***
I upgraded to kde-plasma/plasma-meta-5.27.4 today and after the upgrade my
external monitors connected to my dGPU stopped working. They were working fine
on the previous kde-plasma/plasma-meta (5.26.x) release. I'm using a Lenovo
ThinkPad P52 with hybrid graphics where the internal iGPU (Intel i915) is
connected to the internal monitor and the external ports are connected to the
dGPU (nvidia) via thunderbolt (MUXed system). I've tried re-compiling my
graphics drivers, but this did not resolve the issue. No other packages besides
kde-plasma and the kde-framework packages were updated.
***


STEPS TO REPRODUCE
1. Upgrade to kde-plasma/plasma-meta-5.27.4
2. 
3. 

OBSERVED RESULT
External monitors connected to dGPU no longer working

EXPECTED RESULT
Display on my external monitors

SOFTWARE/OS VERSIONS

Linux/KDE Plasma: 6.1.23-gentoo / 5.27.4
(available in About System)
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.9

ADDITIONAL INFORMATION

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