[vbox-dev] Linux guest: two framebuffer devices? Is it possible?

[Jan Petrouš]

Hi,

as VirtualBox supports dual head config I was trying to start two
framebuffers on it.
But unsucessfull.

The main constraint is that guest Linux is very tiny and has no X-Windows
inside.
The application requires only the framebuffer devices.

I did many hours googling to find solution but I found only solution for
xwin environment.

Is it even possible to enable two FB devices on dualhead configuration?

If the answer is NO, can you show me where I should start to look inside
the sources?

I found the VB Additions subversion repo where are at least two video
drivers:

1,
http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Additions/linux/drm/vbox_fb.c
2,
http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Additions/x11/vboxvideo/vboxvideo.c

I guess that the driver for my non-x11 environment is the first one. Is it
true?

I'm rather linux video driver noob, but I would like to get some good start
point
where I can at least try to start with.

BR.
/Jan

PS: Installed Fedora Server 24 Minimal config, so kernel is 4.6.7
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