wifi 突然连接不上?

wifi 突然连接不上?

我买了一台装有 ubuntu 12.04 的新笔记本电脑。直到昨天,我的无线连接都工作正常。现在突然根本检测不到。它也检测不到任何新连接。我的有线(以太网)连接正常。我试过 rfkill。它们都被解除了阻塞。

iwconfig 返回:

siddarthcr@SID:~$ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

ifconfig 返回:

siddarthcr@SID:~$ ifconfig
eth0      Link encap:Ethernet  HWaddr 74:86:7a:3f:74:84  
          inet addr:192.168.1.2  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::7686:7aff:fe3f:7484/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:750 errors:0 dropped:0 overruns:0 frame:0
          TX packets:814 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:391259 (391.2 KB)  TX bytes:127493 (127.4 KB)
          Interrupt:42 Base address:0x4000 

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:178 errors:0 dropped:0 overruns:0 frame:0
          TX packets:178 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:19962 (19.9 KB)  TX bytes:19962 (19.9 KB)

wlan0 根本没有检测到:

siddarthcr@SID:~$ ifconfig wlan0 up
wlan0: ERROR while getting interface flags: No such device

siddarthcr@SID:~$ lspci -nnk | grep -iEA3 "(wireless|network)"
02:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
    Subsystem: Dell Device [1028:020c

请帮忙...任何帮助都将非常感谢..

答案1

只需尝试运行 aptitude update,然后
从终端 Sudo aptitude升级

这修复了很多问题

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