Looks like pxe booting to install 11.04 causes this issue, while installing via usb stick does not.
usb install: ifconfig: eth0 Link encap:Ethernet HWaddr f0:4d:a2:bc:cf:dd inet addr:10.193.37.126 Bcast:10.193.37.255 Mask:255.255.255.0 inet6 addr: fe80::f24d:a2ff:febc:cfdd/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:84 errors:0 dropped:0 overruns:0 frame:0 TX packets:66 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14809 (14.8 KB) TX bytes:10564 (10.5 KB) Interrupt:41 Base address:0x8000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:144 errors:0 dropped:0 overruns:0 frame:0 TX packets:144 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11104 (11.1 KB) TX bytes:11104 (11.1 KB) route: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.193.37.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth0 0.0.0.0 10.193.37.1 0.0.0.0 UG 100 0 0 eth0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/836885 Title: [Vostro 3550] Ethernet nonfuctional after wifi disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/836885/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs