Settings -> Wifi status "unknown" solved?

[Nathan Kinkade]

I have noticed a number of threads where people have mentioned seeing
Wifi indicate a state of "unknown" in Settings (Exposure).  I too
recently started having that problem.   The very last entry (as I
write this) of this ticket was useful
http://docs.openmoko.org/trac/ticket/1734, mentioning that hald not
running seemed to be the underlying issue.  The solution for me was to
delete /etc/volatile.cache and then reboot.  I'm not sure how the
stale /etc/volatiles.cache file got there without having the hald
entries.