Reopening, upstream has a better patch:
http://gitweb.freedesktop.org/?p=hal.git;a=commitdiff;h=f70301c8f426618d52a31d33c846989b1c8e7a52
** Changed in: hal (Ubuntu)
Status: Fix Released => Fix Committed
--
hal don't find that I'm on a laptop
https://launchpad.net/bugs/59342