FAQ Somewhere? USB error messges
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?
Quoted 8 lines · Yan Seiner
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
Quoted 8 lines
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
Quoted 16 lines · Greg KH
Quoted 14 lines · Yan Seiner
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: unableto 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.
Quoted 7 lines
Quoted 3 lines
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
Quoted 32 lines · Yan Seiner
Quoted 16 lines · Greg KH
Quoted 14 lines · Yan Seiner
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.
Quoted 7 lines
Quoted 3 lines
So now I need to figure out what that error message means. Where can I look up the error code?
Documentation/usb/error-codes.txtThat says things like:
(quoted diff) +0
-2-ENODEV specified USB-device or bus doesn't exist -ENOENT specified interface or endpoint does not exist or is not enabled
Quoted 1 line
It has no information on translating 71 to E*.
That would be found in the include/asm-generic/errno.h file, as EPROTO.
Quoted 3 lines
Unfortunately that doesn't tell me what 71 is about. Grepping
/usr/includefor some of those errors *still* doesn't tell me what error 71 is as it doesn't appear anywhere.
See above.
Quoted 3 lines
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.
Quoted 2 lines
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
Quoted 32 lines · Yan Seiner
Quoted 16 lines · Greg KH
Quoted 14 lines · Yan Seiner
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.
Quoted 7 lines
Quoted 3 lines
So now I need to figure out what that error message means. Where can I look up the error code?
Documentation/usb/error-codes.txtThat says things like:
(quoted diff) +0
-2-ENODEV specified USB-device or bus doesn't exist -ENOENT specified interface or endpoint does not exist or is not enabled
Quoted 4 lines
It has no information on translating 71 to E*. Unfortunately that doesn't tell me what 71 is about. Grepping
/usr/includefor some of those errors *still* doesn't tell me what error 71 is as it doesn't appear anywhere.
$ grep -w 71 /usr/include/asm-generic/errno.h #define EPROTO 71 /* Protocol error */
and see EPROTO in the file that Greg referred you to.
Quoted 5 lines
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.
Signature · 1 line
~Randy
[Sorry Greg - misdirected the last one email]
Quoted 9 lines · Greg KH
Quoted 3 lines · Yan Seiner
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.
HAH! I bet it's power.... I've had problems with power on that hub before - it's "self powered" but only comes with a 500ma wall wart.
Is there a USB user wiki somewhere I can update or where this information could be kept?
--Yan
Signature · 10 lines
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You are an adult when you realize that everyone's an idiot sometimes. You
are wise when you include yourself.Quoted 8 lines · Yan Seiner
[Sorry Greg - misdirected the last one email]
Quoted 5 lines · Greg KH
Quoted 3 lines · Yan Seiner
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.
Quoted 7 lines
Quoted 4 lines
Hope the above information helped.
In short, it looks like you have a broken usb device, or not enough power being sent to it.
HAH! I bet it's power.... I've had problems with power on that hub before - it's "self powered" but only comes with a 500ma wall wart.
Yes, that sounds like the problem.
Quoted 2 lines
Is there a USB user wiki somewhere I can update or where this information could be kept?
Sorry, none that I know of.
good luck,
greg k-h