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[Bug 976813] third party scanner driver "epkowa" does no longer work with openSUSE 13.2 on a particular computer
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Tue, 03 May 2016 08:41:10 +0000
  • Message-id: <bug-976813-21960-XHLDn6dEwc@http.bugzilla.suse.com/>
http://bugzilla.suse.com/show_bug.cgi?id=976813
http://bugzilla.suse.com/show_bug.cgi?id=976813#c18

--- Comment #18 from Johannes Meixner <jsmeix@xxxxxxxx> ---
Regarding comment#16 about using differnt USB kernel drivers:

I am neither a USB expert nor a kernel expert but according to
https://bugzilla.opensuse.org/show_bug.cgi?id=920067#c23
it seems in general it is not possible to use other USB
kernel drivers than those that are automatically used.

As far as I know nowadays USB3 capable hardware in the computer
is different compared to traditional USB2 hardware in the computer
so that for USB3 only xhci_hcd works but xhci_hcd does not work
for traditional USB2.

Note that I am talking about the USB3 chips versus USB2 chips
in the computer i.e. the hardware where the USB kernel drivers
are used for.

One can nevertheless connect a USB2 device to a USB3 connector.
Then the USB3 chips in the computer (with the xhci_hcd kernel driver)
are used for a USB2 device that is connected to a USB3 port,
cf. the section about "USB Speed" in
https://en.opensuse.org/SDB:Configuring_Scanners

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