It's explained in telepathy-gabble 0.10.0 NEWS file: • At the time of release, GNUTLS 2.8 is recommended. For versions 2.10.0 and 2.10.1, some fixes need to be backported from 2.11.1 to fix connection failures with "-59: GNUTLS_E_INTERNAL_ERROR" in the debug log; we're tracking this as <https://bugs.freedesktop.org/show_bug.cgi?id=29364>. This fix is the following: http://git.savannah.gnu.org/gitweb/?p=gnutls.git;a=commit;h=0d07d8432d57805a8354ebd6c1e7829f3ab159cb Thanks Reproducible: Always
This fix is already included in net-libs/gnutls-2.10.2.