virtualbox linux mint software rendering mode

I don't know if VirtualBox 6.2 fixes this problem since this version was recently released.This is my first post here and I'm not sure if the issue I'm having is a Mint 17 issue or a VirtualBox 6 issue. So, I think this problem is a VirtualBox stability problem and so I just use free version of VMWare Workstation Player when I want dual monitor, 'unity/seamless mode', 3D acceleration. I don't have this problem with the free VMWare Workstation Player hypervisor, but I use this other hypervisor, rather than VirtualBox, to run different programs and I like to keep an extra level of seperation, by using a different hypervisor, for this Linux VM.

I use this Linux VM primarily as a browser function for the internet so I need 'seamless mode' with dual monitor support. When I check 3D Acceleration, then 'VBoxVGA' forced to change to another graphics controller. Only able to get this to work with the 'VBoxVGA' graphics controller, which requires the 3D Acceleration to be disabled. I am currently using VirtualBox 6.1 and I need 'seamless mode' to work on dual monitors for me. The warning window is annoying, but is only shown in 'seamless mode' when I move a window over it. This warning does not show when I enable 3D Acceleration, except a problem below if I do enable 3D Acceleration. Yeah, I get the 'check your video drivers' window everytime i start Cinnamon 19.3 VM, with WIn10 host. VirtualBox 'seamless mode' does not allow Open GL 3D features, but I have my doubts of this since, if I do not use dual monitors, then I have zero problems with 3D accelerated 'seamless mode'. Supposedly, I am told this is a problem with VirtualBox software while in 'seamless mode'.

Virtualbox linux mint software rendering mode