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Hello, I'm having trouble with Houdini 15 on my Xubuntu machine. At first I thought it was a problem with the X-Server, because open windows wouldn't redraw themselves and I couldn't open any new ones, but then I realized that setting the mantra threads to 1 seemed to alleviate the problem (8, 7, 6, were all equally bad). It appears that spawned mantra instances kept rendering in the background, which I failed to notice from the unresponsive UI. So now my guess is that mantra hijacks too many system resources, completely stalling the Desktop environment. This applies to the Houdini UI itself too by the way - a few seconds into a preview render, the image doesn't update any more. The same with MPlay when doing an interactive render. I tried starting up Houdini with a "niceness" value of 19 and an mantra instances inherit that, but it doesn't make one bit of difference. I have a fairly beefy system, though with a consumer graphics card (Nvidia GeForce GTX 970). Nvidia drivers are the most recent ones available in the regular Ubuntu repository, i.e. 352. Do you guys have any suggestions on what might alleviate the issue, or maybe have experienced it yourself? I vaguely recall that setting priority low worked for me in the past, but that was back on Windows I think. Thanks.
