Comment 9 for bug 69426

My computer with Xubuntu feisty had a problem with getting an ip-adress after waking from hibernation. I´ve solved this problem by changing /etc/default/acpi-support

Editing this file, look for the line below, where to add [networking] after that no problems anymore:

# Add services to this list to stop them before suspend and restart them in
# the resume process.
STOP_SERVICES="networking"

Hope this will work for you to,
Thomas.