[sane-devel] Problem with libusb and 64 bits 2.6.25 kernel

[m. allan noah]

two random thoughts-

1. can he try 32 bit kernel on same exact machine, just to rule out
hardware problems?

2. is there a pattern to the timeouts, like always same number of
errors before a good packet?

allan

On 5/26/08, Nicolas <nicolas.martin at freesurf.fr> wrote:
> Sam V. posted recently a bug report with a 64 bits kernel, running the
>  pixma backend and a MF-4270 Canon MFP.
>
>  Details here:
>
>  https://alioth.debian.org/tracker/?group_id=30186&atid=410366&func=detail&aid=310861
>
>  He has the pixma backend running fine with a 32 bits kernel (same
>  version as 64 bits) in same conditions.
>
>  On a 64 bits 2.6.25 kernel (Fedora 9) or 2.6.24 (Ubuntu), the logs show
>  that sometimes (but not always, that's why scanning finally works, but
>  takes very long time), there appears to be a:
>
>  "Resource temporarily unavailable"
>
>  error for read calls, from either sanei_usb_read_int() or
>  sanei_usb_read_bulk(). They are triggered by usb_bulk_read() or
>  usb_interrupt_read() calls from libusb.
>
>  This error induces the timeouts, thus long scanning time.
>
>  There do not appear to be errors on write calls (this would make
>  scanning fail).
>
>  I don't know what could cause this libusb error for the 64 bits kernel ?
>
>  Anyone here already experienced this, or would have a clue ?
>
>  Nicolas
>
>
>
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