Comment 5 for bug 181374

I was experiencing the same problem on a Toshiba A105-S4084 with Phoenix BIOS when running Ubuntu Hardy. I updated the BIOS from 1.70 to 6.00, and my FN keys work, as does the screen brightness.

http://www.csd.toshiba.com/cgi-bin/tais/su/su_sc_modItemList.jsp?moid=1373530&rpn=PSAA8U&ct=DL&BV_SessionID=@@@@0643615367.1209421677@@@@&BV_EngineID=cccjadedmelledicgfkceghdgngdgnj.0

Function Keys that Worked right off the bat:
Mute, Suspend, Hibernate, Brightness Down, Brightness Up, Function Key Lock, Numpad Lock, Scroll Lock, Web Browser, Play/Pause, Stop, Previous Track, Next Track

I'm still getting "No Such Device" errors when I try to install the modules, however. My screen brightness control works again, so I'm not really worried about that.