Ubuntu 12.04 not booting

[jmccormac001]

I have a new macbook pro 15'' retina display laptop running OS X 10.8.3. I am running virtualbox v4.2.12 (I just updated it today). I downloaded Ubuntu 12.04 LTS earlier today and installed it as a virtual machine from the iso.

I then installed many packages using apt-get to run a certain piece of software I need. I did the normal:

sudo apt-get update
sudo apt-get upgrade

and then installed all the bits I needed, plus the software I need the virtual box for. Ubuntu also suggested some upgrades. I think there were some kernel upgrades but I never looked closely. Everything was working fine after installing the upgrades and new software. However, when I powered off the VM and then tried rebooting it a while later it does not boot. I see the virtualbox window appear (where I can hit F12) then the screen goes black/brown and nothing happens.

The VM rebooted several times during the upgrades and package installs with no problems. I've spent a couple of hours getting it to the way I need it and now it's not booting. Any ideas?

Cheers James

[noteirak]

Please read Minimum information needed for assistance and include the VM settings command output on top of the guest log file please.

[jmccormac001]

Sorry this was my first post. See below for more info.

Host: Mac OS X 10.8.3 64 bit, 8GB RAM, 250 GB SSD
Guest: Ubuntu 12.04 LTS 64 bit, 4 GB RAM, 20 GB SSD (no Guest additions)

See attached for the most recent log file.

[jmccormac001]

Whoops, I sent that before adding the VM settings, see attached.

[mpack]

Please see the v4.2.12 discussion thread: I think this "Ubuntu not booting" issue already has enough threads covering it.

[jmccormac001]

Do you have a link to the specific thread you mentioned? I have had a look through the forum and cannot find the v4.12.2 thread. Also a search returns nothing. Thanks

James

[mpack]

Discuss the 4.2.12 release.