option to ignore flash memory device at USB1.1 "full" speed
awilliam at redhat.com
Mon Jun 17 20:37:55 UTC 2013
On Sun, 2013-06-16 at 22:33 +0100, Matthew Garrett wrote:
> On Sun, Jun 16, 2013 at 10:11:42PM +0100, David Woodhouse wrote:
> > On Sun, 2013-06-16 at 05:38 +0100, Matthew Garrett wrote:
> > > On Sat, Jun 15, 2013 at 08:24:33AM -0700, John Reiser wrote:
> > > > How can I force the system not to recognize a USB2.0 flash memory
> > > device at USB1.1 speed?
> > >
> > > You can't - it's negotiated at the host controller level, the OS isn't
> > > involved.
> > You can't force it to use USB2 mode when for some reason it's negotiated
> > something slower. But you can *detect* that it's connected as a USB1
> > device and refuse to mount it, surely? And then the user will unplug it
> > and plug it in again, until it works correctly.
> Yeah, I guess you could write a udev rule that detected that case and
> flagged it such that it didn't get automounted.
IIRC, Windows pops up one of its little yellow warnings associated with
a notification tray icon when this happens - the medium is mounted but
you get a warning that it's running at a slow speed. That seems
Fedora QA Community Monkey
IRC: adamw | Twitter: AdamW_Fedora | identi.ca: adamwfedora
More information about the devel