On Sun, 31 Jul 2016 16:40:49 +0200 ac via talk <talk@gtalug.org> wrote:

On Sun, 31 Jul 2016 16:30:37 +0200 ac via talk <talk@gtalug.org> wrote:

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BTW, this link is to discussion of a problem that I'm having. My Fujitsu Scansnap ix500 won't work when plugged into a USB 3 port on Linux. Very odd. This report is two years old and the problem persists. --- eeek, soz, I only just saw this..

On Sun, 31 Jul 2016 10:01:01 -0400 (EDT) "D. Hugh Redelmeier via talk" <talk@gtalug.org> wrote: please post any output from dmesg (directly after plugging usb)? whahaha, triple eeek... (- Sundays... go figure) just reading the way back when link and your logs (http://spark.crystalorb.net/mikem/dmesg.log) I do not yet have anything easy/constructive to add and I promise to only reply if I do :)

I started working through the thread (and the code) to try to understand the issue :) I noted: it seems that we round the interval for high speed bulk, where it should not have an interval that, combined with "Plugging the scanner to a USB2 port works flawlessly" After Mathias coded "It re-configures the endpoint every time a usb device driver clears a halt to make the toggle and sequence stay in sync between xhci and the device" result: - the scanner appears in lsusb then i hit this: https://web.archive.org/web/20150727001119/http://spark.crystalorb.net/mikem... and the reconfiguring of the endpoint solved the problem... Soo, am thinking, in your case... motherboard... --> bios? Is xHCI hand-off enabled in bios settings? (we are using intel... - also, btw eHCI hand-off should be disabled) or still usb 3 issue, passthrough? other than that it sounds like a frustrating and entertaining problem (although it is solved for everyone else afaict :) ) Andre