[gentoo-amd64] Can't connect to internet from Live DVD.

[Henry W. Peters]

Back (again) at trying to install Gentoo with new "stuff." Now, I'm having problems with my "Ralink RT5390R 802.1 bgn Wi-Fi Adapter" (in my new HP Pavillion 500, AMD64 desktop). Besides the Gentoo LiveDVD (AMD64)... in which neither a wireless or ethernet network is apparently detected by the DVD (udev?), I DID try "System rescue CD," no internet connect there either. In the spirit of seeing if I could boot up with UEFI (as you may be aware, Windows 8 version of a bios) & an external USB 3 hard drive (yet some problems to be resolved; i.e., how to handle dual os's in a workable manner), I also tried Ubuntu Studio live DVD (all of this in "legacy" mode, though I did not actually install), & it configured wireless for me, all I had to do was enter my router key... then I also temporarily installed Debian Wheezy & Mate... on the external hd, which wouldn't connect with wireless, but would via ethernet (the installation more or less worked; Gnome 3 does apparently not like my AMD64 Radeon integrated graphics card ). Very puzzling. Any suggestions welcome! Henry P.s., I think I read awhile ago, something about an RF kill switch...? (not sure of the relevancy, but thought I might ask, just in case...)