merlino3d
Doing that you're resetting all preferences, right?

Yes.

edward
I'm not sure why you would need sudo to start Houdini. Try this:
- In a shell: sudo mv $HOME/houdini14.0 $HOME/houdini14.0.old
- Reboot your computer
- Try running from houdini NOT as sudo, but with LC_ALL=C

Thanks, that worked

I have Ubuntu 14.04 LTS with AMD dual graphics.
I am having display issue in Houdini. I think it might be due to graphics card.
Attached the screen shot below. If anybody could suggest me something to fix this it will be really helpful.