Can't install/use KDE Neon User Edition in VirtualBox after update to Plasma 6, it shows black screen

  1. unfortunately, the use of 3D acceleration with Wayland leads to such slowdown that it makes virtual machine almost unusable
  2. usage of graphics driver other than the default one results in interface blinking that is also unusable

I found workaround:

  1. install kdeneon with enabled 3d acceleration (painfully slow, but possible)
  2. once it is installed switch to X11 and turn off 3d acceleration
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