On Thu, Nov 13, 2014 at 09:25:33AM -0800, Steve Kargl wrote:
> On Wed, Nov 12, 2014 at 02:42:13PM -0800, Steve Kargl wrote:
> > I have a kernel/world from r274273 sources, which is exhibiting a new
> > issue on my old laptop.  Neither 'shutdown -p now' nor 'shutdown -r now'
> > work.  I get to the end of shutdown and see for example
> > 
> > All buffers synced
> > Uptime: 4h23m15s
> > 
> > and then the laptop just sits there.  It does not power off with
> > the -p option nor does it reboot with the -r.  Has anyone else
> > seen this behavior?
> > 
> The problem appears to be related to a recent change in the
> USB stack.  If I have the following drive plugged into a
> usb port, the above behavior is observed on shutdown.
> ugen6.2: <Western Digital> at usbus6
> umass0: <MSC Bulk-Only Transport> on usbus6
> da0 at umass-sim0 bus 0 scbus4 target 0 lun 0
> da0: <WD My Passport 0748 1019> Fixed Direct Access SCSI-6 device 
> da0: Serial Number 57584B314537324445595A31
> da0: 40.000MB/s transfers
> da0: 1907697MB (3906963456 512 byte sectors: 255H 63S/T 243197C)
> da0: quirks=0x2<NO_6_BYTE>
> ses1 at umass-sim0 bus 0 scbus4 target 0 lun 1
> ses1: <WD SES Device 1019> Fixed Enclosure Services SCSI-6 device 
> ses1: Serial Number 57584B314537324445595A31
> ses1: 40.000MB/s transfers
> ses1: SCSI-3 ENC Device

The problem is not restricted to hte WD My Passport drive.  The

ugen6.2: <USBest Technology> at usbus6
umass0: <USBest Technology USB Mass Storage Device, class 0/0, rev 2.00/1.00, 
addr 2> on usbus6
da0 at umass-sim0 bus 0 scbus4 target 0 lun 0
da0: <  0.00> Removable Direct Access SCSI-2 device 
da0: Serial Number 08102201c42413
da0: 40.000MB/s transfers
da0: 963MB (1974271 512 byte sectors: 64H 32S/T 963C)
da0: quirks=0x2<NO_6_BYTE>

will also cause the system to wedge when removed.  I failed to report
that /dev/da0, /dev/da0s1, /dev/da0s1a, etc were not destroyed when
the WD My Passport was removed.

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