On Fri, Sep 25, 2015 at 10:26:23AM -0400, Alan Stern wrote: >> Does this mean I have a long bisect ahead of me? > In the absence of any better suggestions, that's the most > straightforward way to get an answer. Three hours of bisecting (actually three bisects; I found a git bug along the way :-/) later shows the culprit: commit 2d2a316765d956bc5cb6bb367b2ec52ca59ab8e9 Author: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx> Date: Tue Jun 16 09:08:26 2015 +0800 usb: core: lpm: set lpm_capable for root hub device I have no idea whatsoever how this breaks bandwidth management, but seemingly it does. /* Steinar */ -- Homepage: http://www.sesse.net/ -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html