Excessivly cheap USB device issue

Robert Noland rnoland at FreeBSD.org
Tue Sep 29 10:38:17 UTC 2009


On Tue, 2009-09-29 at 23:16 +1300, Andrew Thompson wrote:
> On Tue, Sep 29, 2009 at 05:11:24AM -0500, Robert Noland wrote:
> > On Tue, 2009-09-29 at 14:35 +0930, Daniel O'Connor wrote:
> > > On Mon, 28 Sep 2009, Mike Tancsa wrote:
> > > > >I also have a similar device, which I've been messing with a bit the
> > > > >last couple of days.  In your case, it isn't seeing the media, just
> > > > > the "drive".  I've had to try various combinations of unplugging
> > > > > the adapter from usb, inserting the media then plugging it back in.
> > > > >  It does seem to work fairly reliably if you boot with the media
> > > > > already inserted, but it doesn't seem to detect media change at
> > > > > all.
> > > >
> > > > I get around it (on my cheap reader) by  always doing a
> > > > cat /dev/null > /dev/da1
> > > > whever I change or insert new media into the reader
> > > >
> > > > That seems to work with the gear I have 99% of the time.
> > > 
> > > Hmm OK, I sort of expected fdisk da1 to fail straightaway though (it 
> > > takes ~30 seconds to fail for me).
> > > 
> > > I have unplugged it for now, it interacts annoyingly with SANE because 
> > > that scans the SCSI bus(es) looking for scanner and each umass takes 
> > > 30+ seconds to fail.
> > 
> > FWIW, on yesterdays kernel, mine seems to be working properly and
> > detecting media change.  I'm not sure what change helped.  Note that I
> > am running -CURRENT.
> 
> Was that after the sync to Hans's repo? There were around 20 commits so
> if anyone can narrow it down to a single rev then it may be able to be
> merged.

Looks like I'm at r197575, now.

robert.

> 
> Andrew
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-- 
Robert Noland <rnoland at FreeBSD.org>
FreeBSD



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