Author: xry111 Date: Thu Aug 13 13:11:16 2020 New Revision: 23512 Log: firmware: add a paragraph about regulatory.db
Modified: trunk/BOOK/postlfs/config/firmware.xml Modified: trunk/BOOK/postlfs/config/firmware.xml ============================================================================== --- trunk/BOOK/postlfs/config/firmware.xml Thu Aug 13 10:05:09 2020 (r23511) +++ trunk/BOOK/postlfs/config/firmware.xml Thu Aug 13 13:11:16 2020 (r23512) @@ -659,6 +659,23 @@ </para> <para> + Different countries have different regulations on the radio spectrum + usage of wireless devices. You can install a firmware to make the + wireless devices obey local spectrum regulations, so you won't be + inquired by local authority or find your wireless NIC jamming the + frequencies of other devices (for example, remote controllers). + The regulatory database firmware can be downloaded from + <ulink url = 'https://kernel.org/pub/software/network/wireless-regdb/'/>. + To install it, simply extract <filename>regulatory.db</filename> and + <filename>regulatory.db.p7s</filename> from the tarball into + <filename class="directory">/lib/firmware</filename>. + The access point would send a country code to your wireless NIC, + and <xref linkend='wpa_supplicant'/> would tell the kernel to load + the regulation of this country from + <filename>regulatory.db</filename>, and enforce it. + </para> + + <para> Firmware may also be needed for other devices such as some SCSI controllers, bluetooth adaptors, or TV recorders. The same principles apply. -- http://lists.linuxfromscratch.org/listinfo/blfs-book FAQ: http://www.linuxfromscratch.org/blfs/faq.html Unsubscribe: See the above information page