[sane-devel] Is the Iscan backend "epkowa" also affected by USB3 issues?

Johannes Meixner jsmeix at suse.de
Wed Apr 27 14:15:13 UTC 2016

Hello Olaf Meeuwissen,

we (i.e. openSUSE) got an issue report of a user
who uses the "epkowa" backend for an
Epson GT-X770 / Perfection V500
at a USB port with the xhci_hcd kernel driver module
which does not work, cf.

Now I wonder if the "epkowa" backend could be
also affected by the current sane-backends 1.0.25
"Workaround for USB3 problems in Linux kernel"
that seems to no longer work with newest kernels, cf.

In other words, I wonder if the "epkowa" backend uses
the sane-backends USB code or if the "epkowa" backend
implements USB communication on its own.

In the end I like to understand if a version change
of the installed sane-backends software on the user's
computer could make a difference whether or not the
"epkowa" backend works with the xhci_hcd kernel module.

Kind Regards
Johannes Meixner
SUSE LINUX GmbH - GF: Felix Imendoerffer, Jane Smithard,
Graham Norton - HRB 21284 (AG Nuernberg)

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