I spent most of the week battling with the install of Houdini on Ubuntu 11.4, then Mint and finally got it to work. I have the icons showing, and the interface is not frozen like before due to following the instructions on this this forum, which was great by the way! Now, however, I have a different problem: the viewport keeps going blank grey (everything disappears) whenever I move the mouse out of the view port window. I can get the view back by clicking in the viewport but then it disappears upon mousing over ANY icon, boarder, or button. I tried reinstalling the video drivers etc to no avail. I had everything running fine on Win7 64 (still do) but it was just a little slow rendering and cooking some of my particle sims. Any help would be appreciated.

I am running Win7 64 , with Mint4Win on a 3.2 ghz AMD X2 5GB DDR3 RAM, with a 2GB ATI Radeon HD 5670 graphics card.

Thanks in advance for your help!