Issue while recording virtual box with camtasia on windows 8

[Delosari]

Hello everyone. This is my first post on this forum and I wonder if anyone could help with the following issue:

Over the last year I have successfully make video tutorials on linux software using camtasia. To make these tutorials, I use this program to record my computer screen where I have virtual box running ubuntu.

I used to work with a windows 7 host. But recently, I updated my computer to windows 8.1 and when I try to record virtual box I only get a black screen. This only happens when I have a full screen. The audio from ubuntu in the virtual box is recorded fine.

Anyone has any experience on why this happens with windows 8?

thanks for your time.

[mpack]

Presumably this is a consequence of how guest video is rendered on the host. Try turning off 3D acceleration.

[Delosari]

Hello mpack! Thank you very much for your reply:

Do you mean the option within the screen tab in virtual box? That one and the one of 2D are by default deactivated by default... I tried activating them but no luck

[mpack]

Yes, I meant the 3D option in the "Display" branch of the VM settings. You can't just turn them on: these options enabled virtual hardware features which need to be matched by proper drivers, i.e. the 3D option when you install the GAs.

Disabled by default? Strange, I thought 3D is enabled by default in the Win8 VM template.

You obviously have a display driver problem of some kind. How much VRAM did you give the guest? In fact, post a VM log file please. For details see Minimum information needed for assistance.