Comment 1 for bug 1287298

Lately a new driver was added to staging that adds support for this chip:

commit 3c05bedb5fef7a6ada63c5dbf61e1258b9019f05
Author: Greg Kroah-Hartman <email address hidden>
Date: Tue Jan 21 11:20:45 2014 -0800

    Staging: rtl8812ae: Add Realtek 8821 PCI WIFI driver

    This comes directly from the Realtek tarball, filename:
        wifi_driver_8821ae_0018.1129.2013.tar.gz

    I mushed the three modules (btcoexist, rtlwifi and rtl8821ae) together
    into one, in order to make it all build as one stand-alone module.
    After the btcoexist driver gets merged upstream, I'll pull it out of
    here, and will continue to work on removing this version of rtlwifi in
    order to use the in-kernel one.

    Cc: Larry Finger <email address hidden>
    Signed-off-by: Greg Kroah-Hartman <email address hidden>

i cherry picked this driver, added it to our T kernel and made it build like a module - a test kernel is available here:

http://people.canonical.com/~ppisati/R8821AE/linux-image-3.13.0-15-generic_3.13.0-15.35~R8821AE_amd64.deb