Lenovo T530 - Battery Warnings

[Joseph Mingrone]

I convinced a friend to try FreeBSD (9-STABLE amd64) on her Lenovo T530
and things are running quite well.  One problem is that, unlike other
IBM/Lenovos, there is no beep to warn her when the battery is about to
die.  There is also no beep when (un)plugging the power.  Beeping does
work before the OS is loaded (e.g. in the BIOS setup).  The BIOS version
is 2.04.

Is there a fix for this?

Thanks,

Joseph