Hi Rupesh, A kernel bug report was opened against Ubuntu [0]. After a kernel bisect, it was found that reverting the following commit resolved this bug: commit a8425292816ceaa8c49e29d2114e85d85a73e080 Author: Rupesh Tatiya <rtatiya@xxxxxxxxxxxxxx> Date: Tue Apr 14 16:36:55 2015 +0530 usb: Enable LPM for USB 2.01+ full-speed devices The regression was introduced as of v4.2-rc1. I was hoping to get your feedback, since you are the patch author. Do you think gathering any additional data will help diagnose this issue, or would it be best to submit a revert request? Thanks, Joe [0] http://pad.lv/1498667 -- 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