Right, which is why I suggested uninstalling the drivers.
You have something that is hanging on to the USB bus awaiting I/O that is interfering with the Interlink.
Killing the processes stopped the offending task, but it did not remove it.
What I suggested should remove the offending task.
I'll bet the problem will be a camera or printer driver or engine.
If you have a brain dead ( dumb ) host based printer, that will be the culprit.
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Host based printers:
Most of the original InkJet and Laserjet printers had an on board processor and associated RAM memory.
These printers were able to accept and buffer the DESCRIPTION of an entire page of output.
They would take the page description commands and re-assembled the page into a RAM buffer, that was effectively a VIDEO type buffer.
The laser system then would draw the "image" onto the drum ( or the inkjet system would inping the inks upon the page ).
... and you would get your output.
Somewhere along the line many manufacturers decided to go the same route as those old and awful "winmodems".
They decided that the page description parsing could be handled by a process ( aka the "engine" ) resident on your computer.
In turn the process doles out ONE LINE of "dots" at a time to the printer.
This requires precise timing between the computer and the print head/laser. SO the process "sits" on the interface bus... e.g. USB.
The end result is that they saved the cost of the CPU and RAM, lowering their manufacturing costs and increasing their margins!
However these "brain-dead" printers are highly problematic... and as a result most have been religated to the home user, who has lesser printing needs.
Ugh...
