Something in net-misc/dhcpcd-6.0.2 changes the hostname from 'my_hostname' to 'my_hostname.localhost.lan' causing X apps to fail to start with a 'No protocol specified.' 'Can't open display: :0' Error. As reported in these Forum threads: http://forums.gentoo.org/viewtopic-p-7346974.html http://forums.gentoo.org/viewtopic-p-7346870.html May this bug be related to bug 477224 ? Reproducible: Always
AFAICT it's the exact same problem (although you may have found a better description). *** This bug has been marked as a duplicate of bug 477224 ***
Or maybe not. Let's treat them separately for now.
This has been fixed in dhcpcd-6.0.3 which was released today.
This version is in the tree.