netroot doesn't bring up network

After selecting netroot from the friendly menu, I do get root but no network: only the loop interface is up. This happens even though the laptop has in fact both wired and wireless net, both of which do work on the system after a normal boot.

If I run ifconfig eth0 up and dhclient eth0 on the prompt, the wired interface comes up fine, so that's a workaround.

Bug #572426 seems to have been repurposed for something that could make this a duplicate of that. Bug #868748 also describes something similar, but this isn't just about not getting an IP address; the interfaces (apart from lo) aren't brough up automatically at all.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: friendly-recovery 0.2.19
ProcVersionSignature: Ubuntu 3.2.0-14.23-generic 3.2.3
Uname: Linux 3.2.0-14-generic i686
ApportVersion: 1.91-0ubuntu1
Architecture: i386
Date: Sat Feb 4 20:43:45 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=fi:en_US:en
 PATH=(custom, user)
 LANG=fi_FI.UTF-8
 SHELL=/bin/bash
SourcePackage: friendly-recovery
UpgradeStatus: Upgraded to precise on 2011-12-09 (57 days ago)