acpi_ibm fails to work on new laptop

[Kevin Oberman]

I recently went from a ThinkPad T43 to a T520. On the T520, ac[i_ibm
is not functional. 'sysctl dev.acpi_ibm'
returns nothing. No volume control, though MUTE does work.

Any idea about a fix? Can I just change the OEMID to LENOVO? (Probably
should change all "IBM references to LENOVO while I'm at it.)
I'll probably give this a shot, just to see if it works.
-- 
R. Kevin Oberman, Network Engineer - Retired
E-mail: kob6558 at gmail.com