USB devices fail to attach as umass scsi da[n]

[grarpamp]

This dictation recorder fails to attach via usb.
The same problem occurs with a Nikon Coolpix L1.
Both work fine under windows on the same hardware.

Do I need to do something to GENERIC to get this working?
The machine is spare so I can recompile and submit debug
info as need be. Thanks.

GENERIC, RELENG_7 a few days past the 7.1 release.
SuperMicro 370DER motherboard, most recent bios.
The Nikon is set to mass storage. The RCA has no such option.
Both have the latest firmware.

By the way, the RCA records natively in mp3 format. Handy as most
seem to use some closed format. Worth a try if you need one.

# camcontrol devl - should be: (pass2,da2) when attach is complete
scbus2 on umass-sim0 bus 0:
< RCA_TKCF2494_US 1.00>            at scbus2 target 0 lun 0 (da2,pass2)

# dmesg - reordered a bit
umass0: <RCA RCA_TKCF2494_US USB DEVICE, class 0/0, rev 1.10/1.00,
addr 2> on uhub0
umass0:2:0:-1: Attached to scbus2
pass2 at umass-sim0 bus 0 target 0 lun 0
pass2: < RCA_TKCF2494_US 1.00> Removable Direct Access SCSI-0 device
pass2: 1.000MB/s transfers
GEOM: da2 at umass-sim0 bus 0 target 0 lun 0
new disk da2
da2: < RCA_TKCF2494_US 1.00> Removable Direct Access SCSI-0 device
da2: 1.000MB/s transfers
da2: 122MB (251136 512 byte sectors: 64H 32S/T 122C)

(da2:umass-sim0:0:0:0): Synchronize cache failed, status == 0x4, scsi
status == 0x0
(da2:umass-sim0:0:0:0): Request completed with CAM_REQ_CMP_ERR
(da2:umass-sim0:0:0:0): Retrying Command
(da2:umass-sim0:0:0:0): error 5
(da2:umass-sim0:0:0:0): Retries Exausted
Opened disk da2 -> 5

umass0: BBB bulk-in clear stall failed, STALLED
umass0: BBB bulk-out clear stall failed, STALLED
umass0: BBB reset failed, STALLED
umass0: Invalid CSW: tag 14 should be 15