[ 1094.459874] ehci_hcd 0000:00:10.4: EHCI Host Controller [ 1094.464815] ehci_hcd 0000:00:10.4: new USB bus registered, assigned bus number 1 [ 1094.465408] ehci_hcd 0000:00:10.4: irq 21, io mem 0xfdffd000 [ 1094.465424] ehci_hcd 0000:00:10.4: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 [ 1094.467618] usb usb1: configuration #1 chosen from 1 choice [ 1094.468454] hub 1-0:1.0: USB hub found [ 1094.468792] hub 1-0:1.0: 6 ports detected [ 1094.570460] ehci_hcd 0000:00:14.2: EHCI Host Controller [ 1094.570631] ehci_hcd 0000:00:14.2: new USB bus registered, assigned bus number 2 [ 1094.570841] ehci_hcd 0000:00:14.2: irq 20, io mem 0xfdffc000 [ 1094.570853] ehci_hcd 0000:00:14.2: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 [ 1094.571229] usb usb2: configuration #1 chosen from 1 choice [ 1094.571381] hub 2-0:1.0: USB hub found [ 1094.571466] hub 2-0:1.0: 4 ports detected [ 1095.177771] usb 2-1: new high speed USB device using ehci_hcd and address 2 [ 1100.175324] ehci_hcd 0000:00:14.2: Unlink after no-IRQ? Controller is probably using the wrong IRQ.