I have recently installed kubuntu 12.10 on a HP 630. I can not make the wireless card (Atheros AR9285).
The hardware switch button is Fn+F12, by pressing this the indicator led does not change status, however KNetworkManager changes the wireless status: "Wireless disabled in software" or "Wireless disabled by hardware". Unfortunately even in the "Wireless disabled in software" I am unable to enable the wifi: if I click on "Enable wireless", it gets selected for a very short time, then it goes back to disabled, and dmesg outputs this:
02:00.0 Network controller: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) (rev 01)
[ 241.890058] ACPI Error: Field [B128] at 1152 exceeds Buffer [NULL] size 160 (bits) (20120320/dsopcode-236)
[ 241.890077] ACPI Error: Method parse/execution failed [\_SB_.WMID.HWCD] (Node f7429c18), AE_AML_BUFFER_LIMIT (20120320/psparse-536)
[ 241.890104] ACPI Error: Method parse/execution failed [\_SB_.WMID.WMAD] (Node f742a168), AE_AML_BUFFER_LIMIT (20120320/psparse-536)