https://bugs.kde.org/show_bug.cgi?id=430207

            Bug ID: 430207
           Summary: Plasma desktop & SDDM aren't working properly with
                    NVIDIA 455
           Product: plasmashell
           Version: 5.20.4
          Platform: Neon Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: k...@davidedmundson.co.uk
          Reporter: techxga...@outlook.com
                CC: plasma-b...@kde.org
  Target Milestone: 1.0

SUMMARY
On my KDE Neon 20.04 Testing Edition with 5.8.0-31 kernel & dual 1080p+2160p
setup, the display scaled down to 1024x768 and only showed it on my 4K monitor
(can't change the resolution from Plasma's display settings). I tried opening
NVIDIA settings and nothing showed up, either. Reverting back to 450 fixed it.

STEPS TO REPRODUCE
1. Install NVIDIA 455
2. Reboot

OBSERVED RESULT
The output only shows up on the 4K monitor, but not on the 1080p monitor. Upon
login, nothing shows up for NVIDIA settings. and output is 1024x768 on the 4K
monitor.  Also unable to change the resolution.

EXPECTED RESULT
Should work normally, with 4K+1080p, and desktop layout not changing.

SOFTWARE/OS VERSIONS
Operating System: KDE neon Testing Edition
KDE Plasma Version: 5.20.4
KDE Frameworks Version: 5.77.0
Qt Version: 5.15.2
Kernel Version: 5.8.0-31-generic
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-6500 CPU @ 3.20GHz
Memory: 15.6 GiB of RAM
Graphics Processor: GeForce GTX 1060 6GB/PCIe/SSE2

ADDITIONAL INFORMATION
I'm on KDE Neon Testing Edition.

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