Problems like this should always be sent to the mailing list. On Fri, 21 Dec 2012, Kuo Shou-Chien wrote: > Hi Alan, > > Can you help take a look the log and suggest me where I can start trouble shooting? > The usb communication stops at root hub suspend.� > I plugged in the barcode code reader(should be input device) into Atmel 9g45 board, then handshake dies in the middle. > > The same similar issue also happens when I plugged in USB mouse. > > > > > > in ehci_irq > �in ohci_irq > Jan �1 00:01:18 at91sam user.info kernel: in ehci_irq > Jan �1 00:01:18 at91sam user.info kernel: �in ohci_irq > Jan �1 00:01:18 at91sam user.debug kernel: usb usb1: usb resume > Jan �1 00:01:18 at91sam user.debug kernel: atmel-ehci atmel-ehci: resume root hub > Jan �1 00:01:18 at91sam user.debug kernel: hub 1-0:1.0: hub_resume > Jan �1 00:01:18 at91sam user.debug kernel: atmel-ehci atmel-ehci: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT > Jain ehci_irq > �in ohci_irq > n �1 00:01:18 at91sam user.debug kernel: hub 1-0:1.0: port 2: status 0501 change 0001 > Jan �1 00:01:19 at91sam user.debug kernel: hub 1-0:1.0: state 7 ports 2 chg 0004 evt 0000 > Jan �1 00:01:19 at91sam user.debug kernel: hub 1-0:1.0: port 2, status 0501, change 0000, 480 Mb/s > Jan �1 00:01:19 at91sam user.debug kernel: hub 1-0:1.0: skuo : retry 0 status = 0 > Jan �1 00:01:19 at91sam user.debug kernel: atmel-ehci atmel-ehci: port 2 full speed --> companion > Jan �1 00:01:19 at91sam user.debug kernel: atmel-ehci atmel-ehci: GetStatus port 2 status 003801 POWER OWNER sig=j CONNECT > Jan �1 00:01:19 at91sam user.info kernel: in ehci_irq > Jan �1 00:01:19 at91sam user.info kernel: �in ohci_irq > Jan �1 00:01:19 at91sam user.debug kernel: hub 1-0:1.0: port 2 not reset yet, waiting 50ms > Jan �1 00:01:19 at91sam user.debug kernel: atmel-ehci atmel-ehci: GetStatus port 2 status 003002 POWER OWNER sig=se0 CSC > Jan �1 00:01:19 at91sam user.debug kernel: hub 1-0:1.0: skuo : retry status = -107 > Jan �1 00:01:19 at91sam user.debug kernel: hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0004 > Jan �1 00:01:21 at91sam user.debug kernel: hub 1-0:1.0: hub_suspend > Jan �1 00:01:21 at91sam user.debug kernel: usb usb1: bus auto-suspend > Jan �1 00:01:21 at91sam user.debug kernel: atmel-ehci atmel-ehci: suspend root hub I can't tell what's going on without a lot more information. For example, the entire dmesg log starting from boot. You didn't even say what version of the Linux kernel you are using. It looks like the EHCI controller is working properly. Does your board have an OHCI controller? Maybe it's not working right. Alan Stern -- 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
