Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
It is possible that your hub is the problem, simply. Some USB devices do not work through USB hubs, a fact that I have observed in the field. The theory of USB ports is that they are all interchangeable, but in practice that has some exceptions. The USB hub may not perfectly duplicate the performance of the native or on-board USB port, and thus cause problems.
If this (speculated) problem is what is wrong, then your flash drives ought to work fine automounting *if* they are inserted into on-board USB ports on the computer, without a USB hub being involved.
Let me know please. And/or, try this to see if what happens fits with my speculation. Thanks.
I am sorry to hear that the problem is not so simple and easily determined/solved.
I admit I'm not a Linux 'internals' expert. (Unfortunately you may not find one here, but I will cede the case to anyone who things they can help with it.)
One last observation: A long time ago (in the late 1980s) I formed a principle when working with PCs. It runs something like this:
- if the problem is regular, repeats itself *exactly*, and without fail... i.e. "if same problem in same circumstances 100 % of the time"... then it is a problem in the software.
- if the problem is irregular, not always repeating in the same circumstances... then it is probably hardware at fault.
This is based on the notion that incorrectly configured software is always operant a certain way (even if defectively), but hardware... can be flakey.
(Of course, if the variation in circumstances is invisible to one's examination, then variation in problems will occur... so I present this with a strong caveat. As a principle, it can be wrong.)
But please consider this advice. It might help you see what is wrong with the circumstances...? it's the last help I can offer on this, I'm sorry to say.
I have Opted Out, opening the case to other Experts in this category.
Thank you for your understanding and detailed explanation of your assessment of the case, which I believe is substantially correct so far.
I'm sorry if no Ubuntu Expert has picked up the case so far. Thank you for your continued patience.