Comment 9 for bug 1741977

Description of problem:
Lack of USB3 xhci patch makes SANE quite unusable with USB3 hardware;
example with Fujitsu fi-6130 (theoretically fully supported by SANE):

[root@tux ~]# scanimage -L # First run
device `fujitsu:fi-6130dj:108292' is a FUJITSU fi-6130dj scanner
[root@tux ~]#

[root@tux ~]# scanimage -L # Second run a few moments later

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
[root@tux ~]#

Version-Release number of selected component (if applicable):
sane-backends-1.0.24-9.el7

How reproducible:
Everytime, see above and below.

Actual results:
Lack of USB3 xhci patch makes SANE quite unusable with USB3 hardware.

Expected results:
Applying upstream USB3 xhci patch solves the issue (tested myself).

[root@tux ~]# scanimage -L # First run
device `fujitsu:fi-6130dj:108292' is a FUJITSU fi-6130dj scanner
[root@tux ~]#

[root@tux ~]# scanimage -L # Second run a few moments later
device `fujitsu:fi-6130dj:108292' is a FUJITSU fi-6130dj scanner
[root@tux ~]#

[root@tux ~]# scanimage -L # Third run a few moments later
device `fujitsu:fi-6130dj:108292' is a FUJITSU fi-6130dj scanner
[root@tux ~]#

Additional info:
https://src.fedoraproject.org/cgit/rpms/sane-backends.git/plain/sane-backends-1.0.24-usb3-xhci.patch?id=e0bd4233ccf23151f4adfa14f45f328ae57c7c20