virtualbox.org

I'm sure this is something of an FAQ but I have read the other posts and followed the instructions and I'm still quite stuck.

I have an Ubuntu VM running under VB 4.2.12. The Ubuntu version is 12.04.2 LTS.

I just applied some package updates that upgraded the kernel to 3.2.0-48-generic.

Normally after kernel upgrades I noticed that I had to rebuild the guest additions to use larger monitor sizes.

I followed the same procedure but this time it doesn't seem to work and I am stuck with only 1024x768 or 800x600.

The log file from the module build looks OK to me...

Any other ideas on how to fix it?

Depends on the procedure that you mention but not explain what it in fact is.

Hello Perry,

After kernel upgrade I've always mounted the Guest Additions CD/DVD image and then done this:

cd <path to image>

sh ./VBoxLinuxAdditions.run

But after this upgrade and after rebuilding the guest additions the GUI starts with a dialog that says:

The System is Running in Low Graphics mode.

I select the option to run in that mode for one session and I can see in the System Settings -> Displays that I only have the two options mentioned (1024x768 and 800x600).

Pressing "Detect Displays" has no effect.

I can see the vboxvideo module is loaded using "lsmod".

The xorg.conf file lists the Driver as "vboxvideo".

Any other details that would be useful?

Thanks

Known problems. You need a fix available in this Guest Additions ISO: http://www.virtualbox.org/download/test ... -86264.iso

Thanks Stefan. I downloaded this and tried it but I still have the same problem.

I've booted from the previous kernel 3.2.0-38-generic instead of 3.2.0-48-generic and that completely solves the problem and also fixed an issue with the system not powering off cleanly.

So for now I'll stick with the older kernel.