I'm not sure which the culprit is (Houdini or Ubuntu), but when I hit <tab> to bring up the list of nodes I can use, it semi-quickly fades and scales into place rather than just popping-up. By itself this is okay, but as soon as I start typing and the list gets filtered, the original window/list scales out and then a new one scales in.
It's just slow enough to be really annoying
I didn't see anything in the Houdini prefs about this, so I'm guessing it might be an Ubuntu thing. But I'm polling for advice.
I did, yeah (I was reading that exact page this morning, in fact). It definitely affected the startup splash screen, but didn't seem to affect the pop-up menu.
I'm going to try installing 12.5 here (on Centos6) to see what that's like.