﻿id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host
11709,VirtualBox Guest Additions 4.2.12 breaks Ubuntu 12.04 guest => Fixed in SVN,David Anderson,,"I upgraded to VirtualBox version 4.2.12 on my Windows 7 host and the guest additions version 4.2.12 onto my Ubuntu 12.04 guest. Having installed the guest additions, the guest system became unusable with an error about the graphics configuration. It offered to go into low graphics mode but this didn't work either. All I could get was a command prompt. I rolled back to verion 4.2.10 with the following steps and now the system is fine again. Before the roll-back, I tried reinstalling the guest additions but it didn't help.

Rollback procedure (for the benefit of others with the same problem)

1. Uninstalled the guest additions in the Ubuntu guest from the command prompt
cd /opt/VBoxGuestAdditions-4.2.12

sudo ./uninstall.sh

2. Shutdown guest (actually I think it wouldn't shut down and I had to power it off)

3. Uninstalled VirtualBox in Windows (Control Panel, Uninstall a program, Oracle VM VirtualBox 4.2.12).

4. Reinstalled VirtualBox 4.2.10 in Windows 7 host (downloaded from VirtualBox web downloads section, previous versions link).

5. Reinstalled guest additions version 4.2.10 in Ubuntu 12.04 guest.
",defect,closed,guest additions,VirtualBox 4.2.12,fixed,4.2.12 breaks Ubuntu 12.04  guest,,Linux,Windows
