Comment 27 for bug 53387

My apologies, I am officially an idiot.
The ifup script I uploaded was severely broken, which means using it is more or less equivalent to having the udev rule disabled (that's what happens when I try to code before sunset).

I've fixed the error in the script, but it seems it doesn't work -- the original problem has returned. I don't really understand it. The only explanations I can come up with is that either there's some other stupid mistake in my script, that I'm just not seeing; or lo is actually brought up somewhere before /etc/init.d/networking starts; or it is possible to ping localhost over lo even when lo hasn't been brought up yet.

For what it's worth, I'm attaching the patch to fix my ifup script anyway.