I am running Ubuntu Desktop 11.10 on a PC with a Realtek NIC. the details are below.
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: 06
serial: 90:2b:34:76:a3:ad
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8168 driverversion=8.035.00-NAPI duplex=full ip=192.168.1.60 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
resources: irq:40 ioport:e000(size=256) memory:f0004000-f0004fff memory:f0000000-f0003fff


eth0 Link encap:Ethernet HWaddr 90:2b:34:76:a3:ad
inet addr:192.168.1.60 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::922b:34ff:fe76:a3ad/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:62 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:40 Base address:0x4000


Ubuntu 11.10
Celeron CPU G550 2.6 GHz * 2
RAM 4 GB
OS Type 32 bit
HDD 170 GB
As you can see I have installed the r8168 driver as per previous threads and everything "appears" to be correct.
However I can not connect to my LAN. The cable and connections are indicating that the PC is connected to the router, but the Network is showing "Unmanaged network".
This PC has dual boot with Windows 7 and I can connect via Windows network.
Any help would be appreciated
Tony Bray