[sane-devel] sane to work with USB 3.0
olaf.meeuwissen at avasys.jp
Tue Dec 2 04:46:36 UTC 2014
m. allan noah writes:
> Your patch makes no difference for the Fujitsu models in question.
> I'll commit the patch in the next couple days, after some more
One more thing I forgot to mention. I've also noticed that spurious
(lib)usb_clear_halt() calls cause trouble with USB3. The fujitsu
backend doesn't call it (or the sanei wrapper around it) directly but
that may be something to watch out for as well.
I have found filtering a live Wireshark capture with
usb.transfer_type != 03
quite helpful. That makes it easy to spot any SET CONFIGURATION and
CLEAR FEATURE requests.
FWIW, the epkowa backend uses an old version of sanei_usb.c that did not
have the (lib)usb_clear_halt() calls disabled in sanei_open(). That's
how I found out ;-) SANE's master branch has that code
Hope this helps,
Olaf Meeuwissen, LPIC-2 FLOSS Engineer -- AVASYS CORPORATION
FSF Associate Member #1962 Help support software freedom
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