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virtual machine full screen mode after updating

Hi,

I have installed ubuntu 14.04 on oracle virtual machine and right after that I switched to the full screen mode be by installing the Guest Additions with no problem.

But, as I let the system update itself automatically, I have been again switched to small screen. Going to ¨Devices¨ menu I have ¨Insert Guest Additions CD image¨ I receive the following message:

Quote:

Unable to insert virtual optical disk
/usr/share/virtualbox/VBoxGuestAdditions.iso into the machine Ubuntu_linux

How can I solve this problem?

Are you sure that you didn't delete or disable the virtual cdrom from the machine. Before you start the machine check in the settings panel.

Quote:

Originally Posted by EDDY1 (Post 5274140)

Are you sure that you didn't delete or disable the virtual cdrom from the machine. Before you start the machine check in the settings panel.

I did not delete/disable virtual cdrom from the machine.