On Friday 26 June 2009, Maciej Rutecki wrote:

2009/6/26 Frans Pop [off-list ref]:

quoted

I've tried .31-rc1 on my HP 2510p notebook and the only problem I
found was that wireless no longer works. The cause looks to be
related to RFKILL.

Same on HP/Compaq nx6310, caused by hp-wmi module. It's disable
bluetooth and wireless. I must turn it on in Windows XP (in HP tools).
Workaround: don't load hp-wmi. Already I try find how enable it via
/sys like in Windows.

Thanks for narrowing it down.

Well, with 2.6.30 hp-wmi worked together with rfkill without problems.
Looking at the commit logs, it looks like the rfkill rewrite by Johannes 
and Alan is the cause here. CCs added.