Found a workaround:
The error message "rounding interval to 128 microframes, ep desc says 255
microframes" seems to be caused by the xhci driver that handles USB3.0 ports.
Using a USB2.0 port works fine. The same happens with some memory sticks and my
Epson Perfection V10 scanner. Will go and buy an old USB2.0 hub to see if that
solves the problem and look if I can somehow link this bug to the kernel since
the problem seems to lie there.
** Also affects: linux-meta (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1312594
Title:
14.04 won't detect common USB scanner
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