reboot hangs at "uhid2 at uhidev9 report id 7 ..."

[Henry <nbsd4ever%gmail.com@localhost>]

I recently installed 9.1 on a HP 15-au123cl.  The install seemed to go
fairly smoothly, and I was able to get the sets via ftp.

The system kept booting into single user mode, but searching around I
finally figured out that I needed to edit /etc/rc.conf.  I thought I
had successfully changed to rc_configured=YES.

However, since then, whenever I try to boot the machine it hangs at:
[   4.7432765] uhid2 at uhidev9 report id 7: input=0, output=0 feature=256
(the numbers in brackets change; I have seen 7582388, 225.834047, 4.9366070).
There seems to be nothing else to do other than to hold down the power
button and shut the computer off.

What can I do to get the computer to boot?  (Or, did the computer
suddenly give out on me?)

TIA

Henry