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原来一直用的一个wifi，用的好好的，但就在前两天突然就检测不到了，但是实际wifi还是有的（我还有一台window的笔记本连的好好的，随便打开手机也能正常连接上网），无线网卡也是开着的，列表里有几个别的wifi信号，但是原来常用的那个却没有，真是邪门了！wifi的名字与密码都没改过，window系统的那个本一直正常使用。

用 iwlist scan 扫描一下试试。设SSID为TPLINK_BA1404

vickycq 写了：用 iwlist scan 扫描一下试试。设SSID为TPLINK_BA1404

代码： 全选

iwlist scan | grep 'TPLINK_BA1404'

出现了
irda0 Interface doesn't support scanning.

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wifi里选择网络里有其它的wifi信号，但就是没有前阵子用的那一个，奇怪。

wifi里选择网络里有其它的wifi信号，但就是没有前阵子用的那一个，奇怪。

把下面指令 複製 貼進終端機 執行
0. uname -r
1. sudo lspci -knn
1-1. 如果無線網卡是 usb 裝置 請增加
sudo lsusb
2. sudo lshw -numeric -class network
3. sudo ifconfig -a
4. sudo route -nv
5. sudo rfkill list all
把結果直接 選取/複製 貼上來

poloshiao 写了：

wifi里选择网络里有其它的wifi信号，但就是没有前阵子用的那一个，奇怪。

把下面指令 複製 貼進終端機 執行
0. uname -r
1. sudo lspci -knn
1-1. 如果無線網卡是 usb 裝置 請增加
sudo lsusb
2. sudo lshw -numeric -class network
3. sudo ifconfig -a
4. sudo route -nv
5. sudo rfkill list all
把結果直接 選取/複製 貼上來

使用的不是usb的无线网卡。敲入您给的命令后，出现：
第一个：0. uname -r
3.16.0-4-686-pae
第二个：1. sudo lspci -knn
00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub [8086:27a0] (rev 03)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:2017]
Kernel driver in use: agpgart-intel
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:201a]
Kernel driver in use: i915
00:02.1 Display controller [0380]: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller [8086:27a6] (rev 03)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:201a]
00:1b.0 Audio device [0403]: Intel Corporation NM10/ICH7 Family High Definition Audio Controller [8086:27d8] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:2010]
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge [0604]: Intel Corporation NM10/ICH7 Family PCI Express Port 1 [8086:27d0] (rev 02)
Kernel driver in use: pcieport
00:1c.1 PCI bridge [0604]: Intel Corporation NM10/ICH7 Family PCI Express Port 2 [8086:27d2] (rev 02)
Kernel driver in use: pcieport
00:1c.2 PCI bridge [0604]: Intel Corporation NM10/ICH7 Family PCI Express Port 3 [8086:27d4] (rev 02)
Kernel driver in use: pcieport
00:1c.3 PCI bridge [0604]: Intel Corporation NM10/ICH7 Family PCI Express Port 4 [8086:27d6] (rev 02)
Kernel driver in use: pcieport
00:1d.0 USB controller [0c03]: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 [8086:27c8] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:200a]
Kernel driver in use: uhci_hcd
00:1d.1 USB controller [0c03]: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 [8086:27c9] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:200a]
Kernel driver in use: uhci_hcd
00:1d.2 USB controller [0c03]: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 [8086:27ca] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:200a]
Kernel driver in use: uhci_hcd
00:1d.3 USB controller [0c03]: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 [8086:27cb] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:200a]
Kernel driver in use: uhci_hcd
00:1d.7 USB controller [0c03]: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller [8086:27cc] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:200b]
Kernel driver in use: ehci-pci
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev e2)
00:1f.0 ISA bridge [0601]: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge [8086:27b9] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:2009]
Kernel driver in use: lpc_ich
00:1f.2 IDE interface [0101]: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [IDE mode] [8086:27c4] (rev 02)
Subsystem: Lenovo ThinkPad T60 [17aa:200e]
Kernel driver in use: ata_piix
00:1f.3 SMBus [0c05]: Intel Corporation NM10/ICH7 Family SMBus Controller [8086:27da] (rev 02)
Subsystem: Lenovo ThinkPad R60/T60/X60 series [17aa:200f]
Kernel driver in use: i801_smbus
02:00.0 Ethernet controller [0200]: Intel Corporation 82573L Gigabit Ethernet Controller [8086:109a]
Subsystem: Lenovo ThinkPad X60/X60s [17aa:207e]
Kernel driver in use: e1000e
03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4227] (rev 02)
Subsystem: Intel Corporation Device [8086:1010]
Kernel driver in use: iwl3945
15:00.0 CardBus bridge [0607]: Ricoh Co Ltd RL5c476 II [1180:0476] (rev b4)
Subsystem: Lenovo ThinkPad X60/X60s [17aa:201c]
Kernel driver in use: yenta_cardbus
15:00.1 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd R5C552 IEEE 1394 Controller [1180:0552] (rev 09)
Subsystem: Lenovo ThinkPad X60/X60s [17aa:201e]
Kernel driver in use: firewire_ohci
15:00.2 SD Host controller [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter [1180:0822] (rev 18)
Subsystem: Lenovo ThinkPad X60/X60s [17aa:201d]
Kernel driver in use: sdhci-pci

aaa2742 写了： 出现了
irda0 Interface doesn't support scanning.

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wifi里选择网络里有其它的wifi信号，但就是没有前阵子用的那一个，奇怪。

1. 多试几次 iwlist scan，有时NetworkManager正在扫描，占用了无线网卡，iwlist会短时间不能使用

2. 试试 nmcli dev wifi 能否列出

3. 手机做一个新热点，看能否搜到并连接上网

4. 您看错了4楼的信息，'如果無線網卡是 usb 裝置 請增加' 属于层级 1-1，仅有 'lsusb' 一个分支。
再把 结果发上来。

sudo lspci -knn
03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4227] (rev 02)
Subsystem: Intel Corporation Device [8086:1010]
Kernel driver in use: iwl3945

1. https://wireless.wiki.kernel.org/en/use ... s/iwlegacy
Supported Devices
Intel PRO/Wireless 3945ABG (2.6.24)
Firmware 2.6.24+ ~ 2.6.29+

第一个：0. uname -r
3.16.0-4-686-pae

2. 沒看到支援 3.16 的 驅動及韌體
2-1. 如果你還想試試
https://wireless.wiki.kernel.org/_media ... 32.2.9.tgz
下載 iwlwifi-3945-ucode-15.32.2.9.tgz 來試試
但是 有沒有效 要試試才知道

vickycq 写了：

aaa2742 写了： 出现了
irda0 Interface doesn't support scanning.

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wifi里选择网络里有其它的wifi信号，但就是没有前阵子用的那一个，奇怪。

1. 多试几次 iwlist scan，有时NetworkManager正在扫描，占用了无线网卡，iwlist会短时间不能使用

2. 试试 nmcli dev wifi 能否列出

3. 手机做一个新热点，看能否搜到并连接上网

4. 您看错了4楼的信息，'如果無線網卡是 usb 裝置 請增加' 属于层级 1-1，仅有 'lsusb' 一个分支。
再把

代码： 全选

sudo lshw -C network
sudo ifconfig -a
sudo iwconfig
sudo route -nv
sudo rfkill list all

结果发上来。

列出了几个，但是没有想要的那个。

vickycq 写了：

aaa2742 写了： 出现了
irda0 Interface doesn't support scanning.

lo Interface doesn't support scanning.

eth0 Interface doesn't support scanning.

wifi里选择网络里有其它的wifi信号，但就是没有前阵子用的那一个，奇怪。

1. 多试几次 iwlist scan，有时NetworkManager正在扫描，占用了无线网卡，iwlist会短时间不能使用

2. 试试 nmcli dev wifi 能否列出

3. 手机做一个新热点，看能否搜到并连接上网

4. 您看错了4楼的信息，'如果無線網卡是 usb 裝置 請增加' 属于层级 1-1，仅有 'lsusb' 一个分支。
再把

代码： 全选

sudo lshw -C network
sudo ifconfig -a
sudo iwconfig
sudo route -nv
sudo rfkill list all

结果发上来。

个别命令没有，lshw -C network，rfkill list all。
eth0 Link encap:Ethernet HWaddr 00:16:d3:bb:1e:cf
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:16 Memory:ee000000-ee020000

irda0 Link encap:IrLAP HWaddr 00:00:00:00
NOARP MTU:2048 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:8
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

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:28 errors:0 dropped:0 overruns:0 frame:0
TX packets:28 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1680 (1.6 KiB) TX bytes:1680 (1.6 KiB)

wlan0 Link encap:Ethernet HWaddr 00:1b:77:7d:08:16
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)


wlan0 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=15 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off

irda0 no wireless extensions.

lo no wireless extensions.

eth0 no wireless extensions.

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface

怎样把这个网卡的驱动卸掉然后重装一下啊

重装了下系统，发现还是搜索不到，重启了下路由器那边，发现行了，害的我白折腾了。

aaa2742 写了：重装了下系统，发现还是搜索不到，重启了下路由器那边，发现行了，害的我白折腾了。

晕..