Hello!
Configuration: VirtualBox-6.1.4 on Windows 10 host, client is Slackware64-current with kernel-5.5.x
All works fine when I boot to kernel-5.4.x, all modules are compiled - vboxsf, vboxguest and vboxvideo.
As Vbox-6.1.4 supports kernel-5.5.x, I custom compiled that in slackware and rebooted to that kernel.
Vbox compilation of modules failed to compile vboxvideo and only vboxsf and vboxguset modules are compiled and loaded.
As of that, I've got only basic video support and 1024 X 768 GUI.
I compiled kernel-5.5.x with the same .config from working kernel-5.4.x and "make oldconfig"
The kernel-5.5 have a better VBOX support, so my question is which kernel compile options must be ON, and which must be OFF for a linux guest to VBOX compile its modules?
The second question is: Which option is better to compile vboxvideo module by kernel or by VBOX?