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darkgeek/adjust-screen-size-on-vbox

Created June 7, 2016 07:32
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Adjust screen size on Virtualbox
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adjust-screen-size-on-vbox
VirtualBox supports both UGA (Universal Graphic Adapter) and GOP (Graphics Output Protocol) but FreeBSD loader uses GOP. Default GOP mode seems to be 2 (1024x768) and it panics kernel if the system memory is small.
As a stopgap, you may lower the resolution with VBoxManage, i.e.,
VBoxManage setextradata "VM name" VBoxInternal2/EfiGopMode N
where "VM name" is the name of your VM and N is from 0 to 5. For example,
VBoxManage setextradata FreeBSD VBoxInternal2/EfiGopMode 1
will lower video mode to 800x600 for your "FreeBSD" VM. Please see the manual for more information.
https://www.virtualbox.org/manual/ch03.html
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