下列的这我为 Ubuntu 20.04.5 安装了实时内核 5.9.1。使用此内核进入 Ubuntu 系统后，Ubuntu 无法连接无线互联网。右上角没有出现无线互联网图标。
d@xdpx:~/Desktop$ lspci -nnk | grep -i net
00:14.3 Network controller [0280]: Intel Corporation Device [8086:51f0] (rev 01)
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (16) I219-V [8086:1a1f] (rev 01)
Subsystem: Lenovo Ethernet Connection (16) I219-V [17aa:50a0]
根据一些答案，我从下载了 iwlwifi-Qu-48.13675109.0.tgz 英特尔 @ Wi-Fi 6 AX201 160MHz，
tar -zxvf iwlwifi-Qu-48.13675109.0.tgz
cp iwlwifi-*.ucode /lib/firmware
然而，它不起作用。
ifconfig -a
enp0s31f6: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 9c:2d:cd:12:47:a2 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xae300000-ae320000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 4951 bytes 355561 (355.5 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4951 bytes 355561 (355.5 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
使用可以连接无线互联网的 origin 内核
ifconfig -a
enp0s31f6: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 9c:2d:cd:12:47:a2 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
device interrupt 16 memory 0xae300000-ae320000
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 541 bytes 46708 (46.7 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 541 bytes 46708 (46.7 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
wlp0s20f3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.3.144 netmask 255.255.255.0 broadcast 192.168.3.255
inet6 fe80::ae63:6e56:d6e9:66af prefixlen 64 scopeid 0x20<link>
ether 38:7a:0e:bd:fd:da txqueuelen 1000 (Ethernet)
RX packets 10077 bytes 6533823 (6.5 MB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4882 bytes 1700025 (1.7 MB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0