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*. 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.
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? 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.
--Yan
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