https://bugs.kde.org/show_bug.cgi?id=411235

            Bug ID: 411235
           Summary: Plasma not rendering correctly after VTYSwitch with
                    ModeSwitch
           Product: plasmashell
           Version: 5.16.4
          Platform: Archlinux Packages
                OS: Linux
            Status: REPORTED
          Severity: minor
          Priority: NOR
         Component: general
          Assignee: k...@davidedmundson.co.uk
          Reporter: k...@stephan-brunner.net
                CC: plasma-b...@kde.org
  Target Milestone: 1.0

SUMMARY
After doing a VTYSwitch away from Plasma, and then another VTYSwitch back,
Plasma shell does not render correctly anymore.
The start menu and notifications are now transparent.
Note that the VTYSwitches cause a modeswitch from 4k to whatever the
nvidia-driver uses as default.

I am using the latest nvidia-dkms drivers from the arch repos.
When using nouveau, no modeswitch happens, and plasma renders correctly after a
modeswitch

The plasma log is kind of spammy for the same issue.

STEPS TO REPRODUCE
0. Use nvidia proprietary drivers
1. VTYSwitch to VTY2
2. VTYSwitch to Plasma
3. Click on start menu, it is now transparent
4. Any notification is also transparent

OBSERVED RESULT
Rendering of plasma is buggy after vtyswitch with modeswitch


EXPECTED RESULT
Plasma should render correctly


SOFTWARE/OS VERSIONS
Linux: 
  - `uname -a`: Linux XXXXX 5.2.9-arch1-1-ARCH #1 SMP PREEMPT Fri Aug 16
11:29:43 UTC 2019 x86_64 GNU/Linux
KDE Plasma Version: 
  - `plasmashell --version`: plasmashell 5.16.4
KDE Frameworks Version: 6.51.0
Qt Version: 5.13.0

ADDITIONAL INFORMATION
nvidia-dkms 430.40-5 (ArchLinux)
Attached is the Xorg Log and Plasma Log.

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