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SubjectRe: [linux-usb-devel] Error -71 on device descriptor read/all
Date
Am Dienstag, 19. Juni 2007 schrieb Paul Walmsley:
> On Tue, 19 Jun 2007, Oliver Neukum wrote:
>
> > Am Dienstag, 19. Juni 2007 schrieb Chuck Ebbert:
> >
> >> Try disabling CONFIG_USB_SUSPEND
> >>
> >> [usb developers: what are the drawbacks of doing this?]
> >
> > Increased power consumption.
>
> speaking of CONFIG_USB_SUSPEND, I've encountered at least one device -- a
> Canon EOS 5D camera -- that, after the bus suspends, must be powercycled
> in order to return the camera's interrupt endpoints to a functional state.
> How are these types of problems handled, currently?  Is this something for
> a blacklist?

drivers/usb/core/quirks.c

Please try the reset-resume quirk before you use the no-autosuspend quirk.

Regards
Oliver

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