When fullscreen on second display, screen is cut off

[ThomasRedstone]

I'm using VB 4.3.18, on Ubuntu 14.04.1, the guest is Ubuntu 14.10 with Guest Additions, and also SUSE, and when it's full screen on the smaller display it gets cut off (see attachment)

If I disconnect my external display, it works correctly, if I make it full screen on the external display it works correctly.
Any suggestions?

[erb]

I had the same issue.

I found this:

9.19.11. Requesting legacy full-screen mode

As of version 4.3.16, VirtualBox uses special window manager facilities to switch a multi-screen machine to full-screen on a multi-monitor host system. However, not all window managers provide these facilities correctly, so VirtualBox can be told to use the old method of switching to full-screen mode instead using the command:

VBoxManage setextradata global GUI/Fullscreen/LegacyMode true
You can go back to the new method using the command:

VBoxManage setextradata global GUI/Fullscreen/LegacyMode
This is a global setting.


and it worked

PS.
After upgrading my host to Ubuntu 14.10 the issue is gone.

[ThomasRedstone]

thanks erb, I'll upgrade to 14.10 soon!

Something odd, it seems that the laptop display works correctly if the second one is using HDMI, but the reverse for VGA.