我无法在 Lenovo Thinkpad X1 Extreme（第 2 代）上的 Arch Linux 中使用 wifi。我验证了 Intel AX200 网络接口可以通过 Windows 工作。我正在通过有线网络连接访问本地网络（以及通过它访问互联网）。
我正在运行 Linux 版本 5.5.9-arch1-2 (linux@archlinux) (gcc 版本 9.3.0 (Arch Linux 9.3.0-1))
systemd 日志包含以下信息：
kernel: iwlwifi 0000:52:00.0: enabling device (0000 -> 0002)
systemd-udevd[438]: ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-52.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-51.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-50.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-49.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-48.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-47.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-46.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-45.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-44.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-43.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-42.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-41.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-40.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: Direct firmware load for iwlwifi-cc-a0-39.ucode failed with error -2
kernel: iwlwifi 0000:52:00.0: no suitable firmware found!
kernel: iwlwifi 0000:52:00.0: minimum version required: iwlwifi-cc-a0-39
kernel: iwlwifi 0000:52:00.0: maximum version supported: iwlwifi-cc-a0-52
kernel: iwlwifi 0000:52:00.0: check git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
此外，ip link仅显示环回和有线网卡。
当我查看 NetworkManager systemd 日志时，似乎至少尝试使用 wifi：
manager[0x557825231080]: monitoring kernel firmware directory '/lib/firmware'.
manager[0x557825231080]: rfkill: Wi-Fi hardware radio set enabled
manager[0x557825231080]: rfkill: WWAN hardware radio set enabled
Loaded device plugin: NMOvsFactory (/usr/lib/NetworkManager/1.22.10-1/libnm-device-plugin-ovs.so)
Loaded device plugin: NMWifiFactory (/usr/lib/NetworkManager/1.22.10-1/libnm-device-plugin-wifi.so)
Loaded device plugin: NMWwanFactory (/usr/lib/NetworkManager/1.22.10-1/libnm-device-plugin-wwan.so)
Loaded device plugin: NMAtmManager (/usr/lib/NetworkManager/1.22.10-1/libnm-device-plugin-adsl.so)
Loaded device plugin: NMBluezManager (/usr/lib/NetworkManager/1.22.10-1/libnm-device-plugin-bluetooth.so)
Loaded device plugin: NMTeamFactory (/usr/lib/NetworkManager/1.22.10-1/libnm-device-plugin-team.so)
manager: rfkill: Wi-Fi enabled by radio killswitch; enabled by state file
manager: rfkill: WWAN enabled by radio killswitch; enabled by state file
manager: Networking is enabled by state file
运行rfkill list只会产生这样的结果：
0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: no
Hard blocked: no
1: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
编辑：BIOS 信息
- UEFI BIOS 版本 N20ET42W (1.29)
- UEFI Bios 日期 2020-01-20
- 嵌入式控制器版本 N20HT34W (1.21)
- ME 固件版本 12.0.47.1524
- 机器类型 型号 20QVCT01WW
- 无线自动断开连接已禁用
答案1
我通过安装linux-firmware包修复了它。