几天前我升级到了 22.04 版本，从那天起我就一直在与 WiFi 作斗争，但无法让它工作。事实上，卡是存在的，但系统无法识别它。lspci 的输出显示了所有卡的详细信息：
(base) luis@Carmen-HP:~$ lspci -nnk | grep 0280 -A3
04:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095a] (rev 61)
DeviceName: Intel Dual BandWireless-AC 7265 802.11 ac 1x1 WiFi + BT 4.0 Combo Adapter
Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5010]
Kernel driver in use: iwlwifi
但在配置菜单中，WiFi 显示为“不可用”。我尝试了几种方法来更新包“backport-iwlwifi-dkms”和 /lib/firmware 文件夹内容，最后一种方法如下方答案中所述：
但似乎什么都没有改变。我还尝试向 /etc/modprobe.d/iwlwifi.conf 文件添加一些选项，如下所述（抱歉，链接是西班牙语）：
https://slimbook.es/en/tutoriales/linux/79-configurando-driver-wifi-intel-iwlwifi-conf
因为，尽管我的笔记本电脑不是 Slimbook，但芯片是一样的，而且测试很简单。但什么都没变。
dmesg 的输出如下：
(base) luis@Carmen-HP:~$ sudo dmesg | grep iw
[ 5.230910] Loading modules backported from iwlwifi
[ 5.230913] iwlwifi-stack-public:master:9858:4c7cba27
[ 5.285225] iwlwifi 0000:04:00.0: Found debug destination: EXTERNAL_DRAM
[ 5.285240] iwlwifi 0000:04:00.0: Found debug configuration: 0
[ 5.285501] iwlwifi 0000:04:00.0: loaded firmware version 29.f2390aa8.0 7265D-29.ucode op_mode iwlmvm
[ 5.419606] iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 7265, REV=0x210
[ 5.434004] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 5.434396] iwlwifi 0000:04:00.0: Allocated 0x00400000 bytes for firmware monitor.
[ 5.442498] iwlwifi 0000:04:00.0: base HW address: c8:21:58:59:b0:5f, OTP minor version: 0x0
[ 5.505126] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 8.458692] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.537179] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.538492] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 8.559211] iwlwifi 0000:04:00.0: mac start retry 0
[ 8.573295] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.651234] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.652397] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 8.675001] iwlwifi 0000:04:00.0: mac start retry 1
[ 8.689462] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.775924] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.777199] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 8.799885] iwlwifi 0000:04:00.0: mac start retry 2
[ 8.824928] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.902466] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 8.903805] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 8.929417] iwlwifi 0000:04:00.0: mac start retry 0
[ 8.943419] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.029111] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.030368] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 9.052862] iwlwifi 0000:04:00.0: mac start retry 1
[ 9.066967] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.153272] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.154832] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 9.181093] iwlwifi 0000:04:00.0: mac start retry 2
[ 9.211600] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.296095] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.297506] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 9.321403] iwlwifi 0000:04:00.0: mac start retry 0
[ 9.335573] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.421158] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.422423] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 9.445741] iwlwifi 0000:04:00.0: mac start retry 1
[ 9.459838] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.547492] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 9.548780] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 9.573399] iwlwifi 0000:04:00.0: mac start retry 2
[ 20.022804] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.101774] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.102986] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 20.126480] iwlwifi 0000:04:00.0: mac start retry 0
[ 20.140345] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.220178] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.221749] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 20.243784] iwlwifi 0000:04:00.0: mac start retry 1
[ 20.257398] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.336429] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.337671] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 20.359611] iwlwifi 0000:04:00.0: mac start retry 2
[ 20.376628] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.464329] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.465835] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 20.489444] iwlwifi 0000:04:00.0: mac start retry 0
[ 20.503511] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.582267] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.584052] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 20.611604] iwlwifi 0000:04:00.0: mac start retry 1
[ 20.625064] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.704483] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 20.706069] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 20.735718] iwlwifi 0000:04:00.0: mac start retry 2
[ 31.021083] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.107791] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.109129] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 31.131563] iwlwifi 0000:04:00.0: mac start retry 0
[ 31.145200] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.231600] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.233177] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 31.257412] iwlwifi 0000:04:00.0: mac start retry 1
[ 31.271697] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.357149] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.358712] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 31.383568] iwlwifi 0000:04:00.0: mac start retry 2
[ 31.397327] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.484263] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.485594] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 31.509367] iwlwifi 0000:04:00.0: mac start retry 0
[ 31.524566] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.611024] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.612252] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 31.635024] iwlwifi 0000:04:00.0: mac start retry 1
[ 31.649196] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.735292] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 31.736533] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 31.759668] iwlwifi 0000:04:00.0: mac start retry 2
[ 41.884078] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 41.965962] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 41.967469] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 42.001831] iwlwifi 0000:04:00.0: mac start retry 0
[ 42.016263] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.097977] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.099382] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 42.131282] iwlwifi 0000:04:00.0: mac start retry 1
[ 42.145201] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.226990] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.228827] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 42.263716] iwlwifi 0000:04:00.0: mac start retry 2
[ 42.278697] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.359041] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.360471] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 42.386558] iwlwifi 0000:04:00.0: mac start retry 0
[ 42.403035] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.484093] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.485660] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 42.521341] iwlwifi 0000:04:00.0: mac start retry 1
[ 42.536160] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.616209] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 42.617685] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 42.650936] iwlwifi 0000:04:00.0: mac start retry 2
[ 52.728662] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 52.810365] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 52.811919] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 52.840683] iwlwifi 0000:04:00.0: mac start retry 0
[ 52.855481] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 52.944260] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 52.945697] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 52.974703] iwlwifi 0000:04:00.0: mac start retry 1
[ 52.990432] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.070736] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.072130] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 53.105183] iwlwifi 0000:04:00.0: mac start retry 2
[ 53.121337] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.202808] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.204214] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 53.233562] iwlwifi 0000:04:00.0: mac start retry 0
[ 53.247610] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.327163] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.328602] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 53.357672] iwlwifi 0000:04:00.0: mac start retry 1
[ 53.372481] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.453976] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 53.455322] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 53.485314] iwlwifi 0000:04:00.0: mac start retry 2
[ 63.691942] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 63.773512] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 63.774947] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 63.811529] iwlwifi 0000:04:00.0: mac start retry 0
[ 63.827229] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 63.909318] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 63.910867] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 63.945272] iwlwifi 0000:04:00.0: mac start retry 1
[ 63.959628] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.040623] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.042171] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 64.077989] iwlwifi 0000:04:00.0: mac start retry 2
[ 64.093029] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.173908] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.175460] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 64.208745] iwlwifi 0000:04:00.0: mac start retry 0
[ 64.224300] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.314272] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.316293] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 64.350263] iwlwifi 0000:04:00.0: mac start retry 1
[ 64.364806] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.446103] iwlwifi 0000:04:00.0: Applying debug destination EXTERNAL_DRAM
[ 64.447607] iwlwifi 0000:04:00.0: FW already configured (0) - re-configuring
[ 64.482126] iwlwifi 0000:04:00.0: mac start retry 2
并且似乎没有任何东西被硬件或软件阻止：
(base) luis@Carmen-HP:~$ rfkill list all
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
我现在有点想不通了。关于如何获取更多信息或如何恢复我的 wifi，有什么建议吗？
答案1
如果你真的需要反向移植，我会非常惊讶。我建议你这样做：
sudo apt purge backport-iwlwifi-dkms然后重新启动。
答案已移至此处（略作修改）chili555 的评论。