VirtualBox 4.12 Shared clipboard not working in Ubuntu14.04

My Shared clipboard has stopped working all of a sudden after a dist-upgrade. I tried re installing guest additions but it doesn't seem to work. I've checked that "Bidirectional clipboard" was enabled.

Solution 1:

Started working after running: sudo apt-get install virtualbox-guest-dkms and enabling bidirectional shared clipboard.

Solution 2:

Mine wasn't working too, Windows 7 64bit running Ubuntu 10.04. Running the following commands on the guest machine solved for me:

sudo VBoxClient-all stop
sudo VBoxClient-all start

Solution 3:

1. In VirtualBox Menu Devices -> "Insert Guest Additions CD image…"
2. Follow all prompts and accept all installs
3. Reboot

This worked for me with Windows 10 Host and Ubuntu 16.04 Guest.

Solution 4:

I've had same issue.

1) Enabling bidirectional shared clipboard
2) Type following commands:

sudo apt-get update  
sudo apt-get install virtualbox-*  
sudo shutdown -r now