规范说它应该具有：
无线网络 802.11ac 2X2
没有说是什么卡
但是ip link list，，rfkill list——lspci他们都没有找到任何与 Wi-Fi 相关的东西。logdmesg也没有提到任何与 Wi-Fi 相关的东西。就好像它根本就不存在一样……
（请注意，这台笔记本电脑的 ACPI 问题非常严重，dmesg日志中充满了与其相关的错误。它也无法检测到规格所称应该有的硬盘。BIOS 也无法检测到该硬盘。）
我已尝试过将ideapad_laptop模块列入黑名单并加载r8822eb模块——但都没有任何区别（而且我怀疑它们也没有任何区别，因为显然没人能看到这个设备）。
有什么线索可以解决吗？我已经浪费了两天时间试图在这台笔记本电脑上安装 Linux，如果我不得不退回它，那将完全是一种浪费……
我已经看到了，但是听起来不太有希望......rtl8822be 18.04.1（联想 Legion y530 上的新安装）
$ lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers [8086:3ec4] (rev 07)
Subsystem: Lenovo Device [17aa:3802]
Kernel driver in use: skl_uncore
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 07)
Kernel driver in use: pcieport
00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:3e9b]
Subsystem: Lenovo Device [17aa:39fe]
Kernel driver in use: i915
Kernel modules: i915
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [8086:1903] (rev 07)
Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [17aa:381f]
Kernel modules: processor_thermal_device
00:08.0 System peripheral [0880]: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model [8086:1911]
Subsystem: Lenovo Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model [17aa:384e]
00:12.0 Signal processing controller [1180]: Intel Corporation Cannon Lake PCH Thermal Controller [8086:a379] (rev 10)
Subsystem: Lenovo Device [17aa:3807]
Kernel driver in use: intel_pch_thermal
Kernel modules: intel_pch_thermal
00:14.0 USB controller [0c03]: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller [8086:a36d] (rev 10)
Subsystem: Lenovo Device [17aa:3803]
Kernel driver in use: xhci_hcd
00:14.2 RAM memory [0500]: Intel Corporation Cannon Lake PCH Shared SRAM [8086:a36f] (rev 10)
Subsystem: Lenovo Device [17aa:3801]
00:15.0 Serial bus controller [0c80]: Intel Corporation Device [8086:a368] (rev 10)
Subsystem: Lenovo Device [17aa:3806]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:15.1 Serial bus controller [0c80]: Intel Corporation Device [8086:a369] (rev 10)
Subsystem: Lenovo Device [17aa:3809]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.0 Communication controller [0780]: Intel Corporation Cannon Lake PCH HECI Controller [8086:a360] (rev 10)
Subsystem: Lenovo Device [17aa:380e]
Kernel driver in use: mei_me
Kernel modules: mei_me
00:17.0 SATA controller [0106]: Intel Corporation Device [8086:a353] (rev 10)
Subsystem: Lenovo Device [17aa:380a]
Kernel driver in use: ahci
Kernel modules: ahci
00:1d.0 PCI bridge [0604]: Intel Corporation Cannon Lake PCH PCI Express Root Port 9 [8086:a330] (rev f0)
Kernel driver in use: pcieport
00:1d.5 PCI bridge [0604]: Intel Corporation Device [8086:a335] (rev f0)
Kernel driver in use: pcieport
00:1e.0 Communication controller [0780]: Intel Corporation Device [8086:a328] (rev 10)
Subsystem: Lenovo Device [17aa:380f]
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:a30d] (rev 10)
Subsystem: Lenovo Device [17aa:3810]
00:1f.3 Audio device [0403]: Intel Corporation Cannon Lake PCH cAVS [8086:a348] (rev 10)
Subsystem: Lenovo Device [17aa:3812]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1f.4 SMBus [0c05]: Intel Corporation Cannon Lake PCH SMBus Controller [8086:a323] (rev 10)
Subsystem: Lenovo Device [17aa:3813]
Kernel modules: i2c_i801
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller [8086:a324] (rev 10)
Subsystem: Lenovo Device [17aa:3801]
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile] [10de:1c8d] (rev a1)
Subsystem: Lenovo GP107M [GeForce GTX 1050 Mobile] [17aa:39fe]
Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia
06:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981 [144d:a808]
Subsystem: Samsung Electronics Co Ltd Device [144d:a801]
Kernel driver in use: nvme
Kernel modules: nvme
07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15)
Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [17aa:38b4]
Kernel driver in use: r8169
Kernel modules: r8169
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 13d3:56a6 IMC Networks
Bus 001 Device 003: ID 0bda:b023 Realtek Semiconductor Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
答案1
安全启动是否启用以及您使用的是什么内核？
dpkg --list | grep linux-image
同样的问题（Lenovo E585/AMD/Ryzen 2700u），内核 4.19 之前没有 WIFI 开关。禁用安全启动可以解决这个问题，但这不是可接受的解决方案。
mokutil --sb-state
SecureBoot enabled
uname -r
5.0.0-050000rc7-generic
lspci -k | more
…
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 P
CI Express Gigabit Ethernet Controller (rev 10)
Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
Kernel driver in use: r8169
Kernel modules: r8169
04:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device b822
Subsystem: Lenovo Device b024
Kernel driver in use: r8822be