Upgrading Opensoalris Guests and Virtualbox

At Home I run windows 7 on my laptop. And in order to run Opensolaris I use virtualbox. Virtualbox in case you dont know about it basically allows you to run an operating system within your main OS. You can also run windows on an opensolaris machine for example.
I had fallen behind a bit with my virtualbox and opensolaris versions so decided to upgrade everything over the past couple of days. First I upgraded virtualbox to 3.1.4 then Opensolaris to build 132. And my graphical login failed to work. Here’s the error from the X log:

(II) LoadModule: “vboxvideo”
(II) Loading /usr/X11/lib/modules/drivers/vboxvideo_drv.so
dlopen: ld.so.1: Xorg: fatal: relocation error: file /usr/X11/lib/modules/drivers/vboxvideo_drv.so: symbol resVgaShared: referenced symbol not found
(EE) Failed to load /usr/X11/lib/modules/drivers/vboxvideo_drv.so
(II) UnloadModule: “vboxvideo”
(EE) Failed to load module “vboxvideo” (loader failed, 7)

Alan Coopersmith helped me work out what was going wrong here. When you install the guest additions on virtualbox they create an xorg.conf file. The existing conf file I had from build 127 and VB 3.1.1 worked fine, and build 127 with vb 3.1.4 worked fine. But due to changes around Xorg 1.7 things broke when I upgraded opensolaris to build 132 – even though virtualbox has support for this.

The solution?

• Remove the guest additions package.
• Remove the xorg.conf file
• Re-install the guest additions
• Reboot

All works fine now!