另外一个关于wifi的问题，Thinkpad T410/T420 Debian 9 不扫描无线网

新手园地
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1

在2016年初，曾经就在此得到 vickycq 的帮助，

用non-free + 下面两句命令

apt update
apt install firmware-iwlwifi

一直非常顺利，直到最近用Debian 9 安装两台T410/T420遇到了同样的问题，用原来的方法安装firmware-iwlwifi但发现不了无线网，再网上找了不少帖子，但还是不得要领，所以又回到宝地寻求答案。

下面是目前的状况：

# uname -a
Linux ThinkPad 4.9.0-11-amd64 #1 SMP Debian 4.9.189-3+deb9u1 (2019-09-20) x86_64 GNU/Linux

# lspci -knn | grep -iA2 net
00:19.0 Ethernet controller [0200]: Intel Corporation 82577LM Gigabit Network Connection [8086:10ea] (rev 06)
    Subsystem: Lenovo 82577LM Gigabit Network Connection [17aa:2153]
    Kernel driver in use: e1000e
    Kernel modules: e1000e
--
03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6200 [8086:4239] (rev 35)
    Subsystem: Intel Corporation Centrino Advanced-N 6200 2x2 AGN [8086:1311]
    Kernel driver in use: iwlwifi

# lshw -C net
  *-network                 
       description: Ethernet interface
       product: 82577LM Gigabit Network Connection
       vendor: Intel Corporation
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: enp0s25
       version: 06
       serial: 00:26:2d:fe:64:8d
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.12-1 ip=192.168.1.108 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:24 memory:f2600000-f261ffff memory:f2625000-f2625fff ioport:1820(size=32)
  *-network
       description: Wireless interface
       product: Centrino Advanced-N 6200
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlp3s0
       version: 35
       serial: be:71:c0:02:27:55
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.9.0-11-amd64 firmware=9.221.4.1 build 25532 latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:28 memory:f2400000-f2401fff

# dmesg|grep iwl
[   10.747495] iwlwifi 0000:03:00.0: can't disable ASPM; OS doesn't have ASPM control
[   10.795505] iwlwifi 0000:03:00.0: firmware: direct-loading firmware iwlwifi-6000-4.ucode
[   10.795652] iwlwifi 0000:03:00.0: loaded firmware version 9.221.4.1 build 25532 op_mode iwldvm
[   10.851389] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUG disabled
[   10.851390] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEBUGFS disabled
[   10.851391] iwlwifi 0000:03:00.0: CONFIG_IWLWIFI_DEVICE_TRACING disabled
[   10.851393] iwlwifi 0000:03:00.0: Detected Intel(R) Centrino(R) Advanced-N 6200 AGN, REV=0x74
[   10.852583] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   10.940410] ieee80211 phy0: Selected rate control algorithm 'iwl-agn-rs'
[   13.750028] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0
[   23.111234] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.118141] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.118233] iwlwifi 0000:03:00.0: Radio type=0x1-0x3-0x1
[   23.342117] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.349036] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.349127] iwlwifi 0000:03:00.0: Radio type=0x1-0x3-0x1
[   23.446053] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.452963] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.453055] iwlwifi 0000:03:00.0: Radio type=0x1-0x3-0x1
[   23.678544] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.685461] iwlwifi 0000:03:00.0: L1 Enabled - LTR Disabled
[   23.685553] iwlwifi 0000:03:00.0: Radio type=0x1-0x3-0x1

# lshw -numeric -class network
  *-network                
       description: Ethernet interface
       product: 82577LM Gigabit Network Connection [8086:10EA]
       vendor: Intel Corporation [8086]
       physical id: 19
       bus info: pci@0000:00:19.0
       logical name: enp0s25
       version: 06
       serial: 00:26:2d:fe:64:8d
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=3.2.6-k duplex=full firmware=0.12-1 ip=192.168.1.108 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s
       resources: irq:24 memory:f2600000-f261ffff memory:f2625000-f2625fff ioport:1820(size=32)
  *-network
       description: Wireless interface
       product: Centrino Advanced-N 6200 [8086:4239]
       vendor: Intel Corporation [8086]
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlp3s0
       version: 35
       serial: ca:56:d9:d1:6c:73
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.9.0-11-amd64 firmware=9.221.4.1 build 25532 latency=0 link=no multicast=yes wireless=IEEE 802.11
       resources: irq:27 memory:f2400000-f2401fff

# nmcli dev status
DEVICE   TYPE      STATE         CONNECTION
wlp3s0   wifi      disconnected  --        
enp0s25  ethernet  unmanaged     --        
lo       loopback  unmanaged     --

# iwconfig
lo        no wireless extensions.

enp0s25   no wireless extensions.

wlp3s0    IEEE 802.11  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

iw dev wlp3s0 info
Interface wlp3s0
    ifindex 3
    wdev 0x1
    addr ce:5a:75:cc:2e:f3
    type managed
    wiphy 0
    txpower 15.00 dBm

谢谢！

2

错误代码看不懂~
你有没有用no-free live iso 做一个启动U盘测试？
no-free live iso包含iwl-wifi，如果测试可以连接wifi，那么最多重装就应该可以解决了～

3

非常感谢答复！
受youtube上这个视频 How to Install Your Wifi Drivers in Debian 9 Stretch Stable的启发，已经解决了，安装gnome后就出现另外一个按钮，可以看到无线网了，我原先用的是 LXDE，gnome里的网络工具是LXDE两倍多。:smiley:
Linux命令行连接WiFi（全网最简单的方法）

4

这个问题多半是桌面环境的锅，LXDE XFCE 这一类较为精简的桌面环境，轻量的同时，也带来一个缺点：桌面环境的不完整性。这一点上这类桌面环境就比不过大块头的Gnome和KDE这两个桌面环境了。KDE桌面环境虽然算是大块头，但是占用资源现在也非常少，我装的是KDE桌面环境的Debian10，装完后进入桌面，占用内存才450MB。非常少。界面美观的同时资源占用也很低。最重要的是KDE桌面环境非常完整，该有的都有，不会像精简的轻量的桌面环境xfce lxde那样，少这个少那个。

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