[SOLVED]
I could solve the issue searching for the error in the VirtualBox forums: it's
something already found during the upgrade to Virtualbox 4.1.8.
The oneiric package was sort of "relaxed" when checking the host capabilities
(namely, 3D acceleration) for the guest settings, and silently ignored the 3D
acceleration flag for a non-3D-capable host.
The precise package is more strict, and refuses to start in such a situation.
>From the VirtualBox forums:
"The root cause is into the guests configuration. Please open the
VirtualBox graphic client and check the Display settings, most probably
the 3D acceleration is "On" even the guest has no possibility to have
it. In the previous versions this wasn't a problem, but now it seems
that it is checking it.
I haven't any possibility to turn it off from the client (the option is
greyed), so I stopped the VirtualBox client (you must close it, otherwise when
is closing it is writing the configuration back to the disk and your manual
change will be lost) and I manually edit the configuration file for each guest.
The configuration file is located on your computer into ~/VirtualBox VMs/<VM
name>/ as <VM name>.vbox (or at least is what I am guessing).
Please scroll down to the <Display VRAMSize= ... and change the
accelerate3D="true" in accelerate3D="false" and save. Of course you should
backup the configuration file before updating it, just in case.
With this change the guest is starting OK."
** Changed in: virtualbox (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/948486
Title:
Virtualbox appliance working on 11.10 does not start on 12.04 beta1
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