在安装最新更新之前，我的无线网卡一直运行良好。现在，该enable wireless设置已从顶部启动器中的小程序中完全消失。启用网络仍在那里。这是我的无线网卡信息：
无需硬连线重启后：
ole@MKI:~$ iwconfig
eth0 no wireless extensions.
lo no wireless extensions.
使用硬线：
ole@MKI:~$ iwconfig
veth8804537 no wireless extensions.
eth0 no wireless extensions.
lo no wireless extensions.
br-d6801a10bc52 no wireless extensions.
vethfa5d674 no wireless extensions.
veth236d2de no wireless extensions.
docker0 no wireless extensions.
ole@MKI:~$ ifconfig
br-d6801a10bc52 Link encap:Ethernet HWaddr 02:42:fa:7a:67:d4
inet addr:203.0.113.254 Bcast:0.0.0.0 Mask:255.255.255.0
inet6 addr: fe80::42:faff:fe7a:67d4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:13 errors:0 dropped:0 overruns:0 frame:0
TX packets:680 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11368 (11.3 KB) TX bytes:117173 (117.1 KB)
docker0 Link encap:Ethernet HWaddr 02:42:32:a6:65:07
inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:32ff:fea6:6507/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1956 errors:0 dropped:0 overruns:0 frame:0
TX packets:2351 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:607490 (607.4 KB) TX bytes:578053 (578.0 KB)
eth0 Link encap:Ethernet HWaddr a0:1d:48:c2:a9:81
inet addr:192.168.1.9 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::a21d:48ff:fec2:a981/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:269630 errors:0 dropped:0 overruns:0 frame:0
TX packets:158993 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:294183781 (294.1 MB) TX bytes:22427423 (22.4 MB)
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:9713 errors:0 dropped:0 overruns:0 frame:0
TX packets:9713 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:836695 (836.6 KB) TX bytes:836695 (836.6 KB)
veth8804537 Link encap:Ethernet HWaddr 46:d4:42:f2:3d:5b
inet6 addr: fe80::44d4:42ff:fef2:3d5b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1956 errors:0 dropped:0 overruns:0 frame:0
TX packets:2467 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:634874 (634.8 KB) TX bytes:591237 (591.2 KB)
veth236d2de Link encap:Ethernet HWaddr fe:37:ae:f5:26:74
inet6 addr: fe80::fc37:aeff:fef5:2674/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9 errors:0 dropped:0 overruns:0 frame:0
TX packets:801 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:11256 (11.2 KB) TX bytes:131095 (131.0 KB)
vethfa5d674 Link encap:Ethernet HWaddr e2:05:30:83:0e:36
inet6 addr: fe80::e005:30ff:fe83:e36/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:22 errors:0 dropped:0 overruns:0 frame:0
TX packets:815 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:12641 (12.6 KB) TX bytes:142736 (142.7 KB)
ole@MKI:~$ iwconfig
veth8804537 no wireless extensions.
eth0 no wireless extensions.
lo no wireless extensions.
br-d6801a10bc52 no wireless extensions.
vethfa5d674 no wireless extensions.
veth236d2de no wireless extensions.
docker0 no wireless extensions.
答案1
根据您的测试结果，最近的 14.04 更新似乎引入了检测无线硬件的问题。而且显然不仅仅是您的型号 PCI wifi 硬件。
因此，你的选择（都相当痛苦）似乎是
1) 等待修复，同时使用有线以太网。目前已有多个类似的问题报告，因此修复可能很快就会到来。
2）回滚到之前的版本14.04
3）升级到当前 LTS 版本 16.04