On Wed, 2014-12-03 at 10:41 +0100, Marcin Zajączkowski wrote:
> 2014-12-03 Oliver Neukum wrote:
> > On Wed, 2014-12-03 at 00:29 +0100, Marcin Zajączkowski wrote:
> > > Hi,
> > >
> > > After upgrade to Fedora 21 with 3.17.3-300.fc21.x86_64 (from 3.14.x in
> > > Fedora 19) my USB 3.0 drive (Seagate Backup+ 1TB) stopped working with
> > > USB 3.0 port (works fine with USB 2.0 port).
> > >
> > > When plug in for the first time (USB 3.0 port) I see in log:
> > >
> > > > kernel: xhci_hcd 0000:04:00.0: ERROR Transfer event for disabled
> > > endpoint or incorrect stream ring
> > > > kernel: xhci_hcd 0000:04:00.0: @0000000241eec570 11979000 00000002
> > > 05000000 01078001
> >
> > Are you using the UAS driver?
>
> Probably yes. How can check that and/or switch to not UAS driver for a test?
Sysfs holds the information. I can be comfortably queried with the
"usb-devices" script.
To switch drivers you can use the "no UAS" quirk which can be given as
a module parameter like other quirks.
Regards
Oliver
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