I have a problem when plugging in a smartphone, as journalctl shows below:jul 19 17:28:43 newhope.belkin.home kernel: usb 1-1: new full-speed USB device number 2 using xhci_hcdjul 19 17:28:43 newhope.belkin.home kernel: usb 1-1: device descriptor read/64, error -71jul 19 17:28:43 newhope.belkin.home kernel: usb 1-1: device descriptor read/64, error -71jul 19 17:28:44 newhope.belkin.home kernel: usb 1-1: new full-speed USB device number 3 using xhci_hcdjul 19 17:28:44 newhope.belkin.home kernel: usb 1-1: device descriptor read/64, error -71jul 19 17:28:44 newhope.belkin.home kernel: usb 1-1: device descriptor read/64, error -71                                jul 19 17:28:44 newhope.belkin.home kernel: usb 1-1: new full-speed USB device number 4 using xhci_hcd                   jul 19 17:28:44 newhope.belkin.home kernel: usb 1-1: Device not responding to setup address.                             jul 19 17:28:44 newhope.belkin.home kernel: usb 1-1: Device not responding to setup address.                             jul 19 17:28:45 newhope.belkin.home kernel: usb 1-1: device not accepting address 4, error -71                           jul 19 17:28:45 newhope.belkin.home kernel: usb 1-1: new full-speed USB device number 5 using xhci_hcd                   jul 19 17:28:45 newhope.belkin.home kernel: usb 1-1: Device not responding to setup address.jul 19 17:28:45 newhope.belkin.home kernel: usb 1-1: Device not responding to setup address.jul 19 17:28:45 newhope.belkin.home kernel: usb 1-1: device not accepting address 5, error -71jul 19 17:28:45 newhope.belkin.home kernel: usb usb1-port1: unable to enumerate USB devicelsusb output is as follows:[sergio@newhope ~]$ lsusbBus 004 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching HubBus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubBus 003 Device 005: ID 1bcf:289a Sunplus Innovation Technology Inc.Bus 003 Device 004: ID 0cf3:e004 Atheros Communications, Inc.Bus 003 Device 003: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader ControllerBus 003 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching HubBus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubBus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hubBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hubAlso, you can take a look to the usb-devices output at http://pastebin.com/NHD5WBSu.NOTE: I'm using Fedora 22: kernel 4.0.8-300.fc22.x86_64QuestionsWhy does it happen?Is it a (kernel|udev) bug?Is a power issue of internal hub?
Problem with internal USB hub & my smartphone
usb;hardware