gpgv: Signature made Fri Jan  6 17:10:11 2017 UTC using RSA key ID FDCE24FC
gpgv: Can't check signature: public key not found
dpkg-source: warning: failed to verify signature on ./linux-meta_4.4.0.59.62.dsc
dpkg-source: info: extracting linux-meta in linux-meta-4.4.0.59.62
dpkg-source: info: unpacking linux-meta_4.4.0.59.62.tar.gz

$ gpg --keyserver keyserver.ubuntu.com --search FDCE24FC
gpg: searching for "FDCE24FC" from hkp server keyserver.ubuntu.com
(1)     Luis Henriques <lhenriques@suse.de>
        Luis Henriques <henrix@camandro.org>
        Luis Henriques <lhenriques@suse.com>
        Luis Henriques <luis.henriques@canonical.com>
          4096 bit RSA key FDCE24FC, created: 2011-12-10
(2)     Luis Henriques <luis.henriques@canonical.com>
          4096 bit RSA key FDCE24FC, created: 2014-06-16 (revoked)