Comment 125 for bug 554172

I had the same problem, CUPS didn't start with boot machine and apache as well.
This was hellpful:
https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/497299
(comment no.12)

Error was in my /etc/network/interfaces
I had this inside:

auto eth0
iface eth0 inet static
address 192.168.5.10
netmask 255.255.255.0
network 192.168.5.0
broadcast 192.168.5.255
gateway 192.168.5.1

_________________________________
Instead, it shall be like this:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 192.168.5.10
netmask 255.255.255.0
network 192.168.5.0
broadcast 192.168.5.255
gateway 192.168.5.1

(well, I hope that after 3-4 restarts that this problem will not appear again.)

BTW, Lucid looks really great, hope it will be stable in work .
All the best,