Re: 2.6.23.11 : ehci not working with a710 camera

[Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>]

On Sun, 16 Dec 2007, matthieu castet wrote:

> Hi,
> 
> when I plug my canon a710 camera on my ehci (via) controller I got 
> endless "new high speed USB device using ehci_hcd and address" [1].
> 
> AFAIK it was working nice with 2.6.21 kernel.

Is it still working with 2.6.21?  You should make sure, because it's 
possible that something in the _camera_ has broken.  And if 2.6.21 is 
still working, you might want to check out 2.6.22, just to try and 
find exactly when the breakage occurred.

> Removing ehci module make work the camera, but the transfert is slow 
> (and that not a solution).
> 
> What could be done to make the camera work again ?

You have to provide more information.  Start by turning on 
CONFIG_USB_DEBUG and sending the dmesg log.

> [1]
> [  469.067541] usb 4-6: new high speed USB device using ehci_hcd and 
> address 2
> [  469.387255] usb 4-6: new high speed USB device using ehci_hcd and 
> address 3
...
> [  486.143426] usb 4-6: new high speed USB device using ehci_hcd and 
> address 57

By the way, 2 or 3 iterations would have been enough to get the idea
across.  You didn't need to post all 56.  :-)

Alan Stern


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