我目前无法在新升级的 Ubuntu 14.04 上连接到互联网。网络管理器能够识别无线网络，并且可以检测到我何时插入以太网连接，但尝试连接时似乎总是超时。我在工作和家中都尝试过，结果相同。
以下是一些诊断：
用户@主机:~$ sudo lshw -C 网络
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:01:00.0
logical name: eth0
version: 10
serial: 08:9e:01:da:a1:e3
size: 10Mbit/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=8.038.00-NAPI duplex=half latency=0 link=no multicast=yes port=twisted pair speed=10Mbit/s
resources: irq:60 ioport:4000(size=256) memory:b2504000-b2504fff memory:b2500000-b2503fff
*-network
description: Wireless interface
product: Wireless 7260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 73
serial: 0c:8b:fd:4a:af:79
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=3.13.0-36-generic firmware=25.222.9.0 latency=0 link=no multicast=yes wireless=IEEE 802.11bgn
resources: irq:62 memory:b2400000-b2401fff
用户@主机:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 08:9e:01:da:a1: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
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:60 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:65536 Metric:1
RX packets:224 errors:0 dropped:0 overruns:0 frame:0
TX packets:224 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:17008 (17.0 KB) TX bytes:17008 (17.0 KB)
wlan0 Link encap:Ethernet HWaddr 0c:8b:fd:4a:af:79
inet6 addr: fe80::e8b:fdff:fe4a:af79/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:106 errors:0 dropped:0 overruns:0 frame:0
TX packets:275 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:43446 (43.4 KB) TX bytes:50008 (50.0 KB)
用户@主机:~$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
用户@主机:~$ lspci -vnn |复制代码
01:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 10)
Kernel driver in use: r8168
用户@主机:~$ lspci -vnn |复制代码
02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 73)
Subsystem: Intel Corporation Wireless-N 7260 [8086:4262]
用户@主机:~$ vim /etc/network/interfaces
auto lo
iface lo inet loopback
用户@主机:~$ vim /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 8.8.8.8
用户@主机:~$ vim /etc/hosts
127.0.0.1 localhost
127.0.1.1 Host
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
用户@主机:~$ vim /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=true
我觉得我已经尝试了所有方法，没有其他选择了。如果有人知道接下来该怎么办，请告诉我。
非常感谢！