I had installed x11-base/xfree-4.3.0-r6 configured for ipv6 on a machine without ipv6 support (forgot the option in the kernel). When I logged into this machine with "ssh -X" it refused forwarding X11. Using strace I finally found the problem: xfree just tries to use ipv6, and then gives up. IMO it should try ipv4 too. Not sure, if this should go on bugs.gentoo.org, or if this is really a bug, but it took me quite some time to figure it out... Reproducible: Always Steps to Reproduce: 1. 2. 3.
Please reopen and change the summary if this is still a problem with >=xorg-x11-6.8.0.