[Pkg-utopia-maintainers] Bug#755202: network-manager: keeps creating and using new connection "eth0" that does not work

[Matthijs Kooijman]

Hey folks,

previously, people suggested completely disabling ipv6 as a workaround
(or at least debugging tool). This, combined with the previous analysis
made me realize another workaround: Just disable ipv6 autoconf by the
kernel. I dropped these two lines in my sysctl.conf:

	net.ipv6.conf.eth0.autoconf=0
	net.ipv6.conf.eth0.accept_ra=0

Now, this bug seems to be gone (even with the 5-second sleep, tried
twice so far). From my logs, I see that a link-local ipv6 address is
still assigned, but apparently that does not trigger the broken
behaviour.

Also, this only prevents ipv6 configuration during the initial boot,
when the boot is complete, eth0 has a complete set of ipv6 addresses as
well (presumably because NetworkManager handles this).

Gr.

Matthijs
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