Solved... "New" Problem with jackd in Dream Studio
Still learning... But just last night I tried another cofiguration of jack, latest of literally hundreds of attempts. No luck. I have been making it worse instead of better, and the message window got shorter, ending with "Sorry, can not start jack".... Then I once more reconfigured it as it was when I copied and pasted the original message. Of course it failed with basically the same message.
While (once again) reading through the message window, I noticed "ALSA can not resolve one channel" (paraphr.)So I setup jack once again and specified 2 channels. Problem solved, even though I thought I had done that before...
To answer your question,I believe jack was updated automatically with system updater, though I wasn't paying close attention when it happened, there were a bunch of updates at the time, and one 'security update' seemed to be having problems downloading (I think) because the wireless connection was shutting down whenever the macine would go into power save mode/ screensaver..
(this is a 'laptop' intel 950 chip 64 bit intel integrated HDA sound. But I am running all 32 bit linux software)
I hope this helps someone else, even though the issue was minor, it was impossible to record audio with jack not properly set up. There are still sound issues, for instance the tiny onboard speaker won't work, testing the sound in system tests results in a hang with "waiting for sound to respond", but the headphone output and soundcard midi has worked fine, even when jack was not running. I am still working to resolve an issue with "system timer resolution too low, 240hz" as well. "sudo ......... snd-rtctimer" results in "fatal,module not found" message. Probably the subject of another question/thread....
I'll be happy to provide what little info I have garnered if anyone has a question, and thanks for the response!!!