有时我的 WLAN 可以工作，有时它不显示任何网络（尽管有很多；我可以用手机看到）。重新启动有帮助。我有一个英特尔无线 8260 芯片。我使用专有驱动程序，因为不使用它根本不起作用。
这是什么问题？我该如何解决？
调试输出
芯片得到认可：
$ sudo lshw -C network
*-network
description: Wireless interface
product: Wireless 8260
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 3a
serial: 44:85:00:74:18:41
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-21-generic firmware=16.242414.0 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
resources: irq:128 memory:f2100000-f2101fff
*-network
description: Ethernet interface
product: Ethernet Connection (2) I219-LM
vendor: Intel Corporation
physical id: 1f.6
bus info: pci@0000:00:1f.6
logical name: enp0s31f6
version: 31
serial: 50:7b:9d:e2:0c:93
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 firmware=0.8-3 latency=0 link=no multicast=yes port=twisted pair
resources: irq:125 memory:f2200000-f221ffff
*-network
description: Ethernet interface
physical id: 1
logical name: enxe20c6546aca7
serial: e2:0c:65:46:ac:a7
capabilities: ethernet physical
configuration: broadcast=yes driver=rndis_host driverversion=22-Aug-2005 firmware=RNDIS device ip=192.168.42.112 link=yes multicast=yes
驱动程序似乎已加载：
$ lsmod | grep wifi
iwlwifi 200704 1 iwlmvm
cfg80211 565248 3 iwlwifi,mac80211,iwlmvm
iwconfig 也显示了它。它不能通过功能键禁用，因为Tx-Power=0 dBm和 不是Tx-Power=off：
$ sudo iwconfig
enxe20c6546aca7 no wireless extensions.
enp0s31f6 no wireless extensions.
lo no wireless extensions.
wlp3s0 IEEE 802.11abgn ESSID:off/any
Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Encryption key:off
Power Management:off
当 Dmesg 不起作用时：
dmesg | grep -e iwl -e wlp
[ 4.033651] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8000C-19.ucode failed with error -2
[ 4.033666] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8000C-18.ucode failed with error -2
[ 4.033804] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8000C-17.ucode failed with error -2
[ 4.056273] iwlwifi 0000:03:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[ 4.098668] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
[ 4.098977] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.099898] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.100833] iwlwifi 0000:03:00.0: can't access the RSA semaphore it is write protected
[ 4.246808] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 4.247687] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0
[ 4.510635] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
[ 4.510968] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.511344] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.512637] iwlwifi 0000:03:00.0: can't access the RSA semaphore it is write protected
[ 4.651268] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.652059] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.652926] iwlwifi 0000:03:00.0: can't access the RSA semaphore it is write protected
[ 4.739438] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
dmesg 工作时：
$ dmesg | grep -e iwl -e wlp
[ 4.002403] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8000C-19.ucode failed with error -2
[ 4.002418] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8000C-18.ucode failed with error -2
[ 4.003545] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-8000C-17.ucode failed with error -2
[ 4.019494] iwlwifi 0000:03:00.0: loaded firmware version 16.242414.0 op_mode iwlmvm
[ 4.068569] iwlwifi 0000:03:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
[ 4.068879] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.069859] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.072034] iwlwifi 0000:03:00.0: can't access the RSA semaphore it is write protected
[ 4.218682] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 4.219874] iwlwifi 0000:03:00.0 wlp3s0: renamed from wlan0
[ 4.620410] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
[ 4.620953] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.621328] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.621998] iwlwifi 0000:03:00.0: can't access the RSA semaphore it is write protected
[ 4.760365] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.760788] iwlwifi 0000:03:00.0: L1 Enabled - LTR Enabled
[ 4.761451] iwlwifi 0000:03:00.0: can't access the RSA semaphore it is write protected
[ 4.852426] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
[ 5.174281] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
[ 20.399706] wlp3s0: authenticate with 00:1f:3f:10:85:c7
[ 20.408384] wlp3s0: send auth to 00:1f:3f:10:85:c7 (try 1/3)
[ 20.415065] wlp3s0: authenticated
[ 20.417192] wlp3s0: associate with 00:1f:3f:10:85:c7 (try 1/3)
[ 20.428684] wlp3s0: RX AssocResp from 00:1f:3f:10:85:c7 (capab=0x411 status=0 aid=3)
[ 20.430381] wlp3s0: associated
[ 20.430426] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
答案1
当后续固件文件发布并可用时，您的驱动程序会加载 -16 固件。在网络连接正常的情况下，请打开终端并执行以下操作：
sudo apt-get update
sudo apt-get install git
git clone https://github.com/OpenELEC/iwlwifi-firmware.git
cd iwlwifi-firmware
sudo cp iwlwifi-8000C* /lib/firmware
重新启动并告诉我们是否有任何改进。
答案2
虽然 chili555 的答案非常好，并且可以消除这些令人讨厌的错误，但您也可以尝试这个：
sudo systemctl restart network-manager.service
如果有效，您可以创建一个脚本来实现自动化。
打开终端并输入以下内容：
sudo nano /etc/systemd/system/wifi-resume.service现在右键单击将脚本粘贴到那里。按 CTRL + X 退出并按 Y 保存。现在激活它：sudo systemctl enable wifi-resume.service
脚本：
#/etc/systemd/system/wifi-resume.service
#sudo systemctl enable wifi-resume.service
[Unit]
Description=Restart networkmanager at resume
After=suspend.target
After=hibernate.target
After=hybrid-sleep.target
[Service]
Type=oneshot
ExecStart=/bin/systemctl restart network-manager.service
[Install]
WantedBy=suspend.target
WantedBy=hibernate.target
WantedBy=hybrid-sleep.target
希望这有帮助。它在我的笔记本电脑上运行良好。（英特尔 7265）