6MB video ram?! When I tested with all virtualbox defaults (pre-defined during virtual machine setup), which includes 10MB video RAM, it took forever to get anywhere with the install process, and seems to stall during the X configuration/probe setup. The PC-BSD installer gives a warning about using less than 256MB of RAM but I am only able to increase up to 128MB which is quite acceptable for me. I am running VirtualBox from PC-BSD v9.0 in KDE, and attempted to install 64bit v9.1beta into a virtual Machine.
The configuration that VirtualBox assigns as default (FreeBSD 64):
Base memory: 128MB
Boot order: Floppy, CD/DVD, HDD
Acceleration: VT-x/AMD-V, Nested Paging
Video Memory: 10MB (3d and 2d acceleration disabled)
Remote Desktop Server: disabled
IDE Primary Master: 2GB, dynamic, VDI format
IDE Secondary Master: CD/DVD
Host Driver: OSS Audio Driver
Controller: ICH AC97
Adapter 1: Intel PRO/1000 MT Desktop (NAT)
I have tested various levels of Video RAM and System RAM in the Virtual machine. As I mentioned earlier, 10MB Video RAM seems quite unusable. I tried with a 4GB virtual hard disk, and agreeing to all defaults during install, but it did not successfully reboot for part 2 of the install, complaining of running out of space.
So far, the most minimal functional system has 8GB HDD, 128MB Video memory, and 176MB base memory - it may not be speedy and may not have much space for adding much else. The other defaults were left untouched. PC-BSD defaults to LXDE for this level of hardware. Now to compare this to the automated defaults provided by VirtualBox itself, we discover that it is far from possible to have a desktop-oriented install of PC-BSD v9.1beta. Which may give those seeking a similar minimalist system some clues to why their setting(s) failed. I am curious what levels the auto-defaults are set to trigger for the various possible PC-BSD installs (ie, ZFS has certain RAM expectations, KDE may have a minimum HDD size).
Have a great day filled with success!