Ubuntu 15.04 - Not just slow, also doesn't recognize one of the USB devices.... Similar to what others reported, except after usb errors and insanely slow boot time, my Kinesis Advantage PRO MPC/USB Keyboard (which has a USB hub) doesn't work. The lsusb output shows that the hub is recognized, but the keyboard is not. After boot, I have to unplug the keyboard, wait a few seconds, then plug in the keyboard again in order for it to be recognized. Motherboard is similar to others affected in this bug, ASUS Z87 series [ 0.000000] DMI: ASUS All Series/SABERTOOTH Z87, BIOS 2103 08/18/2014 Below is usb information from the following circumstances: 1. 'dmesg|grep -i usb' Immediately after boot completed 2. 'lsusb' Immediately after boot completed 3. Unplug Kinesis keyboard, additional output from 'dmesg|grep -i usb' 4. Plug Kinesis keyboard back in, additional output from 'dmesg|grep -i usb' 5. 'lsusb' output at this point 6. 'systemd-analyze blame' 7. 'uname -a' Immediately after boot: $ dmesg|grep -i usb [ 0.220777] ACPI: bus type USB registered [ 0.220786] usbcore: registered new interface driver usbfs [ 0.220791] usbcore: registered new interface driver hub [ 0.220802] usbcore: registered new device driver usb [ 0.478834] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1 [ 0.478954] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 [ 0.478955] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 0.478956] usb usb1: Product: xHCI Host Controller [ 0.478956] usb usb1: Manufacturer: Linux 3.19.0-23-generic xhci-hcd [ 0.478957] usb usb1: SerialNumber: 0000:00:14.0 [ 0.479019] hub 1-0:1.0: USB hub found [ 0.481098] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2 [ 0.481119] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003 [ 0.481119] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 0.481120] usb usb2: Product: xHCI Host Controller [ 0.481121] usb usb2: Manufacturer: Linux 3.19.0-23-generic xhci-hcd [ 0.481122] usb usb2: SerialNumber: 0000:00:14.0 [ 0.481176] hub 2-0:1.0: USB hub found [ 0.481831] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 0.481888] ehci-pci 0000:00:1a.0: new USB bus registered, assigned bus number 3 [ 0.497717] ehci-pci 0000:00:1a.0: USB 2.0 started, EHCI 1.00 [ 0.497733] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002 [ 0.497734] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 0.497735] usb usb3: Product: EHCI Host Controller [ 0.497736] usb usb3: Manufacturer: Linux 3.19.0-23-generic ehci_hcd [ 0.497737] usb usb3: SerialNumber: 0000:00:1a.0 [ 0.497808] hub 3-0:1.0: USB hub found [ 0.497922] ehci-pci 0000:00:1d.0: new USB bus registered, assigned bus number 4 [ 0.513729] ehci-pci 0000:00:1d.0: USB 2.0 started, EHCI 1.00 [ 0.513749] usb usb4: New USB device found, idVendor=1d6b, idProduct=0002 [ 0.513750] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 0.513751] usb usb4: Product: EHCI Host Controller [ 0.513751] usb usb4: Manufacturer: Linux 3.19.0-23-generic ehci_hcd [ 0.513752] usb usb4: SerialNumber: 0000:00:1d.0 [ 0.513823] hub 4-0:1.0: USB hub found [ 0.513892] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 0.513905] uhci_hcd: USB Universal Host Controller Interface driver [ 0.789994] usb 1-5: new high-speed USB device number 2 using xhci_hcd [ 0.814026] usb 3-1: new high-speed USB device number 2 using ehci-pci [ 0.830076] usb 4-1: new high-speed USB device number 2 using ehci-pci [ 0.946494] usb 3-1: New USB device found, idVendor=8087, idProduct=8008 [ 0.946497] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 0.946639] hub 3-1:1.0: USB hub found [ 0.962499] usb 4-1: New USB device found, idVendor=8087, idProduct=8000 [ 0.962500] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 0.962672] hub 4-1:1.0: USB hub found [ 11.227227] usb 2-5: device not accepting address 2, error -62 [ 16.139583] usb 1-5: device descriptor read/64, error -110 [ 31.369047] usb 1-5: device descriptor read/64, error -110 [ 31.585233] usb 1-5: new high-speed USB device number 3 using xhci_hcd [ 46.710610] usb 1-5: device descriptor read/64, error -110 [ 61.940072] usb 1-5: device descriptor read/64, error -110 [ 62.156258] usb 1-5: new high-speed USB device number 4 using xhci_hcd [ 72.593488] usb 1-5: device not accepting address 4, error -62 [ 72.705585] usb 1-5: new high-speed USB device number 5 using xhci_hcd [ 83.146811] usb 1-5: device not accepting address 5, error -62 [ 83.146822] usb usb1-port5: unable to enumerate USB device [ 83.258915] usb 1-6: new full-speed USB device number 6 using xhci_hcd [ 83.388138] usb 1-6: New USB device found, idVendor=1e7d, idProduct=2d51 [ 83.388140] usb 1-6: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 83.388141] usb 1-6: Product: ROCCAT Kone[+] [ 83.388142] usb 1-6: Manufacturer: ROCCAT [ 83.555178] usb 1-7: new low-speed USB device number 7 using xhci_hcd [ 83.688149] usb 1-7: New USB device found, idVendor=0e8f, idProduct=0022 [ 83.688161] usb 1-7: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 83.688163] usb 1-7: Product: USB KB V11 [ 83.688164] usb 1-7: Manufacturer: GASIA [ 83.688298] usb 1-7: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes [ 83.688301] usb 1-7: ep 0x82 - rounding interval to 64 microframes, ep desc says 80 microframes [ 83.855442] usb 1-14: new full-speed USB device number 8 using xhci_hcd [ 83.985689] usb 1-14: New USB device found, idVendor=05f3, idProduct=0081 [ 83.985702] usb 1-14: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 83.985703] usb 1-14: Product: Kinesis Keyboard Hub [ 83.985704] usb 1-14: Manufacturer: PI Engineering [ 83.985837] usb 1-14: ep 0x81 - rounding interval to 1024 microframes, ep desc says 2040 microframes [ 83.986268] hub 1-14:1.0: USB hub found [ 84.029515] usbcore: registered new interface driver usbhid [ 84.029516] usbhid: USB HID core driver [ 84.031471] input: GASIA USB KB V11 as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:0E8F:0022.0003/input/input14 [ 84.033704] input: ROCCAT ROCCAT Kone[+] as /devices/pci0000:00/0000:00:14.0/usb1/1-6/1-6:1.0/0003:1E7D:2D51.0001/input/input15 [ 84.083689] hid-generic 0003:0E8F:0022.0003: input,hidraw0: USB HID v1.10 Keyboard [GASIA USB KB V11] on usb-0000:00:14.0-7/input0 [ 84.084548] input: GASIA USB KB V11 as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.1/0003:0E8F:0022.0004/input/input16 [ 84.139958] koneplus 0003:1E7D:2D51.0001: input,hiddev0,hidraw1: USB HID v1.00 Mouse [ROCCAT ROCCAT Kone[+]] on usb-0000:00:14.0-6/input0 [ 84.140247] input: ROCCAT ROCCAT Kone[+] as /devices/pci0000:00/0000:00:14.0/usb1/1-6/1-6:1.1/0003:1E7D:2D51.0002/input/input17 [ 84.195924] hid-generic 0003:0E8F:0022.0004: input,hidraw2: USB HID v1.10 Device [GASIA USB KB V11] on usb-0000:00:14.0-7/input1 [ 84.251824] koneplus 0003:1E7D:2D51.0002: input,hidraw3: USB HID v1.11 Keyboard [ROCCAT ROCCAT Kone[+]] on usb-0000:00:14.0-6/input1 At this point, lsusb output is: $ lsusb Bus 004 Device 002: ID 8087:8000 Intel Corp. Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 8087:8008 Intel Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 007: ID 0e8f:0022 GreenAsia Inc. Bus 001 Device 006: ID 1e7d:2d51 ROCCAT Kone+ Mouse Bus 001 Device 008: ID 05f3:0081 PI Engineering, Inc. Kinesis Integrated Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub At this point, I unplug the Kinesis keyboard, as shown in dmesg: [ 748.907560] usb 1-14: USB disconnect, device number 8 Then, when I re-plug in the keyboard, dmesg shows: [ 860.263930] usb 1-14: new full-speed USB device number 9 using xhci_hcd [ 860.394296] usb 1-14: New USB device found, idVendor=05f3, idProduct=0081 [ 860.394304] usb 1-14: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 860.394308] usb 1-14: Product: Kinesis Keyboard Hub [ 860.394312] usb 1-14: Manufacturer: PI Engineering [ 860.394537] usb 1-14: ep 0x81 - rounding interval to 1024 microframes, ep desc says 2040 microframes [ 860.395060] hub 1-14:1.0: USB hub found [ 860.668562] usb 1-14.2: new full-speed USB device number 10 using xhci_hcd [ 860.768238] usb 1-14.2: New USB device found, idVendor=05f3, idProduct=0007 [ 860.768240] usb 1-14.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 860.772206] input: HID 05f3:0007 as /devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14.2/1-14.2:1.0/0003:05F3:0007.0005/input/input18 [ 860.824489] hid-generic 0003:05F3:0007.0005: input,hidraw4: USB HID v1.00 Keyboard [HID 05f3:0007] on usb-0000:00:14.0-14.2/input0 [ 860.829515] input: HID 05f3:0007 as /devices/pci0000:00/0000:00:14.0/usb1/1-14/1-14.2/1-14.2:1.1/0003:05F3:0007.0006/input/input19 [ 860.884536] hid-generic 0003:05F3:0007.0006: input,hidraw5: USB HID v1.00 Device [HID 05f3:0007] on usb-0000:00:14.0-14.2/input1 And now the lsusb output shows the Kinesis keyboard as well as the hub: $ lsusb Bus 004 Device 002: ID 8087:8000 Intel Corp. Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 8087:8008 Intel Corp. Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 007: ID 0e8f:0022 GreenAsia Inc. Bus 001 Device 006: ID 1e7d:2d51 ROCCAT Kone+ Mouse Bus 001 Device 010: ID 05f3:0007 PI Engineering, Inc. Kinesis Advantage PRO MPC/USB Keyboard Bus 001 Device 009: ID 05f3:0081 PI Engineering, Inc. Kinesis Integrated Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub systemd-analyze blame 1min 22.455s systemd-udev-settle.service $ uname -a Linux notmyhostname 3.19.0-23-generic #24-Ubuntu SMP Tue Jul 7 18:52:55 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux