Comment 46 for bug 139045

Ben & Phillip, you'll find that all of these additions have been fixed in 2..6.24. I ensured that the laptops handled in the dmi_table in Gutsy and 2.6.24 match.

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=04d86d6fc0477f217d60667adfc26f1f56264cc9

The last was the M4:
http://kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.24-rc5