I have a wired connection in my student dorm room which doesn't come up in network-manager with 12.04. It does work with Windows 7 though,so it's not anything hardware related,i would say.
On a spare partition on my HD i tried installing another 12.04,just to be sure it wasn't some configuration of mine being wrong: turns out,it doesn't work either.
The funny thing is that NM would recognize the connection until yesterday,so i thought some update had to with this,but there was nothing in the logs that seems to be able to break something network related..
I don't know why the last line is commented,but i tried uncommenting it but it wouldn't work,and even worse it would say "device unmanaged". I then tried setting managed=true but it went back to not recognizing the connection,so i just rolled everything back.
iface lo inet loopback
#iface eth0 inet dhcp
ifconfig eth0 :
lshw -C network:
eth0 Link encap:Ethernet HWaddr 00:26:9e:0a:2a:e3
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:47 Base address:0xc000
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
width: 64 bits
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=N/A latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:47 ioport:5000(size=256) memory:d1010000-d1010fff memory:d1000000-d100ffff memory:d1020000-d102ffff
/var/log/dpkg.log (just the part for yesterday,because yesterday connection worked):
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 02)
The wired connection isn't even seen by ubuntu..it's like the cable was unplugged!
Anybody that can help me?