Unity Freeze At Logon in Ubuntu 14.04 LTS on Parallels

Running Ubuntu 14.04 after installing some updates it was no longer possible to get access to desktop. After logging in the desktop froze. Ctrl+Alt+T failed to bring up a Terminal Window in Unity, although this did work in Gnome Classic desktop. (although this desktop also failed to start)


Hit Ctrl+ALT F2 to get TTY console, logged in and ran


unity --advanced-debug

We can see error message /usr/bin/compwiz (core) – Error: Plugin ‘opengl’ not loaded


For this issue I re-installed the Parallels Drivers. To do so in Parallels I selected Virtual Machine –> Reinstall Parallels Tools

Then from console ran the following commands:

mkdir -p /mnt/cdrom sudo mount -t iso9660 -o ro /dev/cdrom /mnt/cdrom cd /mnt/cdrom sudo ./install


Then followed prompts to reinstall Parallels drivers…


After a reboot desktop now worked correctly…

About chentiangemalc

specializes in end-user computing technologies. disclaimer 1) use at your own risk. test any solution in your environment. if you do not understand the impact/consequences of what you're doing please stop, and ask advice from somebody who does. 2) views are my own at the time of posting and do not necessarily represent my current view or the view of my employer and family members/relatives. 3) over the years Microsoft/Citrix/VMWare have given me a few free shirts, pens, paper notebooks/etc. despite these gifts i will try to remain unbiased.
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