Same here. I haven't had any connection problems with the new driver - and my system was worse than Robs.
I'll update my MOTU support incident - and keep an eye on it, but I'm hopeful that we've got a solid driver now ;-)
I'm not seeing better performance (which has always been fine) just a solution for the connection problem.
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only slightly related
I continuously try to find ways to get my PC to run on buffer sizes smaller than 128 samples. (this gives me 8ms RTL in SONAR, which is fine, but I'm always trying to do better - especially for tracking guitar parts through am sims).
Settings at 64 buffers have never worked for me - but curiously, I get better results at 32 samples than at 64 (?)
I still get too much "crackling" at the 32 sample settings (with different safety offset settings) but I don't get the pegged meters and distorted audio like at 64 sample settings.
I wonder if this has to do with which plugins are running in SONAR?