On Thu, Feb 19, 2009 at 04:59:28AM -0800, Yan Seiner wrote: > Greg KH wrote: >> On Wed, Feb 18, 2009 at 07:13:24PM -0800, Yan Seiner wrote: >> >>> I have a device that has fallen off my usb hub. It now refuses to >>> connect with: >>> >>> Feb 18 18:57:21 selene kernel: [217569.165436] usb 2-4.4.4.4.4.3: new low >>> speed USB device using ehci_hcd and address 55 >>> Feb 18 18:57:22 selene kernel: [217569.572035] usb 2-4.4.4.4.4.3: device >>> not accepting address 55, error -71 >>> Feb 18 18:57:22 selene kernel: [217569.572366] hub 2-4.4.4.4.4:1.0: >>> unable to enumerate USB device on port 3 >>> >>> I'm fairly sure it's not the device as I have two identical ones that >>> work fine in other hubs. I'm fairly sure it's not the hub as I have >>> other devices that work fine on that hub. >>> >>> So now I need to figure out what that error message means. Where can I >>> look up the error code? >>> >> >> Documentation/usb/error-codes.txt >> >> > That says things like: > > -ENODEV specified USB-device or bus doesn't exist > > -ENOENT specified interface or endpoint does not exist or > is not enabled > > > It has no information on translating 71 to E*. That would be found in the include/asm-generic/errno.h file, as EPROTO. > Unfortunately that doesn't tell me what 71 is about. Grepping > /usr/include for some of those errors *still* doesn't tell me what > error 71 is as it doesn't appear anywhere. See above. > Is there any reason why the hotplug subsystem has to throw those cryptic > errors with no pointers to any docs where we might be able to decipher > them? That's not the hotplug system, that's the kernel giving off those messages. > We're in userland; we don't deal with this on a daily basis, and we > have no clue where any of the info we need to understand those errors lies. Hope the above information helped. In short, it looks like you have a broken usb device, or not enough power being sent to it. good luck, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
