sorry, got the letter branch cleaned, so haven`t seen your reply tested on 4.9.9 kernel [13964.125187] sd 7:0:0:0: [sdc] Attached SCSI removable disk [13964.150525] DMAR: DRHD: handling fault status reg 2 [13964.150532] DMAR: [DMA Read] Request device [02:00.0] fault addr fffb1000 [fault reason 06] PTE Read access is not set [13995.848713] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14001.072566] usb 4-2: device descriptor read/8, error -110 [14001.179732] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14006.448780] usb 4-2: device descriptor read/8, error -110 [14006.760494] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14011.824973] usb 4-2: device descriptor read/8, error -110 [14011.932178] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14017.201216] usb 4-2: device descriptor read/8, error -110 [14017.480842] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14022.577498] usb 4-2: device descriptor read/8, error -110 [14022.684584] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14027.953593] usb 4-2: device descriptor read/8, error -110 [14028.457289] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14033.585880] usb 4-2: device descriptor read/8, error -110 [14033.693042] usb 4-2: reset SuperSpeed USB device number 2 using xhci_hcd [14038.962098] usb 4-2: device descriptor read/8, error -110 [14039.125361] usb 4-2: USB disconnect, device number 2 [14039.125363] device: 'ep_81': device_unregister [14039.125376] PM: Removing info for No Bus:ep_81 [14039.125380] device: 'ep_02': device_unregister [14039.125387] PM: Removing info for No Bus:ep_02 [14039.125396] bus: 'usb': remove device 4-2:1.0 [14039.125402] device: '7:0:0:0': device_unregister [14039.125530] PM: Removing info for No Bus:7:0:0:0 [14039.125543] device: '7:0:0:0': device_create_release [14039.125544] device: '7:0:0:0': device_unregister [14039.125554] device: 'sg6': device_unregister [14039.125600] PM: Removing info for No Bus:sg6 [14039.125609] device: 'sg6': device_create_release [14039.125614] PM: Removing info for No Bus:7:0:0:0 [14039.125643] bus: 'scsi': remove device 7:0:0:0 [14039.125659] PM: Removing info for No Bus:7:0:0:0 [14039.141263] sd 7:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [14039.141266] sd 7:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 01 dd 7d 00 00 00 20 00 [14039.141267] blk_update_request: I/O error, dev sdc, sector 31292672 [14039.141293] sd 7:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK [14039.141295] sd 7:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 01 dd 7d 28 00 00 30 00 [14039.141296] blk_update_request: I/O error, dev sdc, sector 31292712 [14039.141471] PM: Removing info for No Bus:sdc1 [14039.141887] PM: Removing info for No Bus:sdc [14039.141901] PM: Removing info for scsi:7:0:0:0 [14039.169409] device: '8:32': device_unregister [14039.169433] PM: Removing info for No Bus:8:32 [14039.169456] device: '8:32': device_create_release [14039.169480] bus: 'scsi': remove device target7:0:0 [14039.169481] PM: Removing info for scsi:target7:0:0 [14039.237389] device: 'host7': device_unregister [14039.237419] PM: Removing info for No Bus:host7 [14039.237435] bus: 'scsi': remove device host7 [14039.237436] PM: Removing info for scsi:host7 [14039.237557] PM: Removing info for usb:4-2:1.0 [14039.237574] device: 'ep_00': device_unregister [14039.237584] PM: Removing info for No Bus:ep_00 [14039.237664] bus: 'usb': remove device 4-2 [14039.237681] PM: Removing info for usb:4-2 [14039.357502] usb 4-2: new SuperSpeed USB device number 3 using xhci_hcd [14044.594310] usb 4-2: device descriptor read/8, error -110 [14044.701462] usb 4-2: new SuperSpeed USB device number 3 using xhci_hcd [14049.970453] usb 4-2: device descriptor read/8, error -110 [14050.225967] usb 4-2: new SuperSpeed USB device number 4 using xhci_hcd [14055.346768] usb 4-2: device descriptor read/8, error -110 [14055.453926] usb 4-2: new SuperSpeed USB device number 4 using xhci_hcd [14060.722987] usb 4-2: device descriptor read/8, error -110 [14061.038377] usb 4-2: new SuperSpeed USB device number 5 using xhci_hcd [14066.099154] usb 4-2: device descriptor read/8, error -110 [14066.206302] usb 4-2: new SuperSpeed USB device number 5 using xhci_hcd [14071.475416] usb 4-2: device descriptor read/8, error -110 [14071.730816] usb 4-2: new SuperSpeed USB device number 6 using xhci_hcd [14076.851671] usb 4-2: device descriptor read/8, error -110 [14076.958765] usb 4-2: new SuperSpeed USB device number 6 using xhci_hcd [14082.227800] usb 4-2: device descriptor read/8, error -110 [14082.362951] usb usb4-port2: unable to enumerate USB device [14082.363062] xhci_hcd 0000:02:00.0: Stop endpoint command completion for disabled slot 2 any suggestions? 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