我最近购买了一台联想 IdeaPad S540-14IML，无线网卡为“Intel(R) Wireless-AC 9560 160MHz”。我安装了 Ubuntu 18.04LTS，虽然 WiFi 在 Windows 10 上运行良好，但在查看 WiFi 设置时，我收到了经典的“未找到 WiFi 适配器”消息。我尝试了在不同线程中找到的多种可能的解决方案，但都无济于事，所以我重新安装了 Ubuntu，希望你们这些好心人能帮我一把。
到目前为止我尝试过的一些方法：
-关闭 Windows 快速启动
-使用最新的 Intel 9560 固件替换 /lib/firmware/ 中的相关 umod 文件，这两个固件均来自英特尔网站（https://www.intel.com/content/www/us/en/support/articles/000005511/network-and-io/wireless-networking.html）如果失败了，从 git（https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/stats/iwlwifi-9000-pu-b0-jf-b0-34.ucode），然后输入“modprobe iwlwifi”
-这不是提到的 RealTek 无线网卡，但我尝试安装驱动程序https://github.com/tomaspinho/rtl8821ce不管怎样，我已经重新安装了 Ubuntu，所以这次失败的尝试没有造成任何影响
- 检查 rfkill 列表中的块（没有）
-全面更新Ubuntu 18.04
-这不是一个全球连接问题，因为我可以通过蓝牙用手机在笔记本电脑上使用互联网
以下是一些可能有用的输出：
sudo lshw -c network
*-network
description: Network controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list
configuration: driver=iwlwifi latency=0
resources: irq:16 memory:b1318000-b131bfff
*-network
description: Ethernet interface
physical id: 3
logical name: bnep0
serial: 0c:7a:15:16:3a:9f
capabilities: ethernet physical
configuration: broadcast=yes ip=192.168.44.64 multicast=yes
lspci -nnk
00:14.3 Network controller [0280]: Intel Corporation Device [8086:02f0]
Subsystem: Intel Corporation Device [8086:0034]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
iwconfig
lo no wireless extensions.
bnep0 no wireless extensions.
rfkill list all
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
dmesg | grep iwlwifi
[ 2.429958] iwlwifi 0000:00:14.3: TLV_FW_FSEQ_VERSION: FSEQ Version: 43.2.23.17
[ 2.429961] iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
[ 2.429962] iwlwifi 0000:00:14.3: Found debug configuration: 0
[ 2.430167] iwlwifi 0000:00:14.3: loaded firmware version 48.13675109.0 op_mode iwlmvm
[ 2.452946] iwlwifi 0000:00:14.3: Detected Intel(R) Wireless-AC 9560, REV=0x354
[ 2.459913] iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
[ 2.460338] iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
[ 3.487742] iwlwifi 0000:00:14.3: Collecting data: trigger 15 fired.
[ 3.487816] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[ 3.487818] iwlwifi 0000:00:14.3: Status: 0x00000000, count: 2078277280
[ 3.487819] iwlwifi 0000:00:14.3: Loaded firmware version: 48.13675109.0
[ 3.487821] iwlwifi 0000:00:14.3: 0x4D7BDBBB | ADVANCED_SYSASSERT
[ 3.487821] iwlwifi 0000:00:14.3: 0xC5BC0048 | trm_hw_status0
[ 3.487822] iwlwifi 0000:00:14.3: 0x9BEDC70E | trm_hw_status1
[ 3.487823] iwlwifi 0000:00:14.3: 0x7761CB02 | branchlink2
[ 3.487824] iwlwifi 0000:00:14.3: 0x73E65F6B | interruptlink1
[ 3.487824] iwlwifi 0000:00:14.3: 0x81882239 | interruptlink2
[ 3.487825] iwlwifi 0000:00:14.3: 0x09B2CD8C | data1
[ 3.487826] iwlwifi 0000:00:14.3: 0xBCE26AEF | data2
[ 3.487827] iwlwifi 0000:00:14.3: 0xE5567DAD | data3
[ 3.487827] iwlwifi 0000:00:14.3: 0x89D40C00 | beacon time
[ 3.487828] iwlwifi 0000:00:14.3: 0x31868332 | tsf low
[ 3.487829] iwlwifi 0000:00:14.3: 0xF2463A4D | tsf hi
[ 3.487830] iwlwifi 0000:00:14.3: 0xEB598D6D | time gp1
[ 3.487831] iwlwifi 0000:00:14.3: 0x0A023D38 | time gp2
[ 3.487831] iwlwifi 0000:00:14.3: 0xDCFED0EA | uCode revision type
[ 3.487832] iwlwifi 0000:00:14.3: 0xC1C4F95D | uCode version major
[ 3.487833] iwlwifi 0000:00:14.3: 0x8BAB7EEB | uCode version minor
[ 3.487834] iwlwifi 0000:00:14.3: 0x018C3340 | hw version
[ 3.487834] iwlwifi 0000:00:14.3: 0x5262E743 | board version
[ 3.487835] iwlwifi 0000:00:14.3: 0x694A2202 | hcmd
[ 3.487836] iwlwifi 0000:00:14.3: 0xB3C347DA | isr0
[ 3.487837] iwlwifi 0000:00:14.3: 0x9E3DBCB8 | isr1
[ 3.487837] iwlwifi 0000:00:14.3: 0x19047D60 | isr2
[ 3.487838] iwlwifi 0000:00:14.3: 0x64A8A33E | isr3
[ 3.487839] iwlwifi 0000:00:14.3: 0xDEE82AEE | isr4
[ 3.487840] iwlwifi 0000:00:14.3: 0x5FCEB3BE | last cmd Id
[ 3.487840] iwlwifi 0000:00:14.3: 0x068F20E5 | wait_event
[ 3.487841] iwlwifi 0000:00:14.3: 0x20EC4428 | l2p_control
[ 3.487842] iwlwifi 0000:00:14.3: 0xAE8E1FE9 | l2p_duration
[ 3.487843] iwlwifi 0000:00:14.3: 0xAC72CEB3 | l2p_mhvalid
[ 3.487843] iwlwifi 0000:00:14.3: 0xB1521E3F | l2p_addr_match
[ 3.487844] iwlwifi 0000:00:14.3: 0x5E434641 | lmpm_pmg_sel
[ 3.487845] iwlwifi 0000:00:14.3: 0x7BFDBF5E | timestamp
[ 3.487846] iwlwifi 0000:00:14.3: 0x85B94E75 | flow_handler
[ 3.487878] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
[ 3.487879] iwlwifi 0000:00:14.3: Status: 0x00000000, count: 7
[ 3.487880] iwlwifi 0000:00:14.3: 0x201013F1 | ADVANCED_SYSASSERT
[ 3.487881] iwlwifi 0000:00:14.3: 0x00000000 | umac branchlink1
[ 3.487881] iwlwifi 0000:00:14.3: 0xC008CF5C | umac branchlink2
[ 3.487882] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink1
[ 3.487883] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink2
[ 3.487884] iwlwifi 0000:00:14.3: 0x00000003 | umac data1
[ 3.487884] iwlwifi 0000:00:14.3: 0x20000302 | umac data2
[ 3.487885] iwlwifi 0000:00:14.3: 0x01300202 | umac data3
[ 3.487886] iwlwifi 0000:00:14.3: 0x00000030 | umac major
[ 3.487887] iwlwifi 0000:00:14.3: 0x13675109 | umac minor
[ 3.487887] iwlwifi 0000:00:14.3: 0x00005CB7 | frame pointer
[ 3.487888] iwlwifi 0000:00:14.3: 0xC0887F58 | stack pointer
[ 3.487889] iwlwifi 0000:00:14.3: 0x00000000 | last host cmd
[ 3.487890] iwlwifi 0000:00:14.3: 0x00000000 | isr status reg
[ 3.487906] iwlwifi 0000:00:14.3: Fseq Registers:
[ 3.487908] iwlwifi 0000:00:14.3: 0x00000003 | FSEQ_ERROR_CODE
[ 3.487910] iwlwifi 0000:00:14.3: 0x00260000 | FSEQ_TOP_INIT_VERSION
[ 3.487912] iwlwifi 0000:00:14.3: 0x00000000 | FSEQ_CNVIO_INIT_VERSION
[ 3.487915] iwlwifi 0000:00:14.3: 0x0000A384 | FSEQ_OTP_VERSION
[ 3.487917] iwlwifi 0000:00:14.3: 0x46065A00 | FSEQ_TOP_CONTENT_VERSION
[ 3.487919] iwlwifi 0000:00:14.3: 0x4552414E | FSEQ_ALIVE_TOKEN
[ 3.487922] iwlwifi 0000:00:14.3: 0x20000302 | FSEQ_CNVI_ID
[ 3.487924] iwlwifi 0000:00:14.3: 0x01300202 | FSEQ_CNVR_ID
[ 3.487926] iwlwifi 0000:00:14.3: 0x20000302 | CNVI_AUX_MISC_CHIP
[ 3.487931] iwlwifi 0000:00:14.3: 0x01300202 | CNVR_AUX_MISC_CHIP
[ 3.487935] iwlwifi 0000:00:14.3: 0x0000485B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[ 3.487969] iwlwifi 0000:00:14.3: 0xA5A5A5A2 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 3.487998] iwlwifi 0000:00:14.3: SecBoot CPU1 Status: 0x5c26, CPU2 Status: 0x3
[ 3.487998] iwlwifi 0000:00:14.3: Failed to start RT ucode: -110
[ 3.488001] iwlwifi 0000:00:14.3: Firmware not running - cannot dump error
[ 3.499790] iwlwifi 0000:00:14.3: Failed to run INIT ucode: -110
感谢您提供的任何帮助，我已经使用 Ubuntu 十多年了，我真的不想再回到 Windows :S
编辑
Chili555 的解决方案非常有效，请参阅其他帖子。谢谢！
答案1
我在 L13 Yoga ThinkPad 上使用 Ubuntu 19.10 时可能也遇到了同样的问题。通过恢复到较旧的内核解决了这个问题，在我的情况下 5.3.0-18 可以工作，但任何比这个更高的版本都不行。
如果您最近刚刚安装，您可能已经获得了带有新 5.3 内核的新 18.04.4 版本，并且可能会遇到完全相同的问题。
跑步
uname -a
它应该告诉您拥有哪个内核，如果它比 5.3.0-18 更新，您可能遇到与我相同的问题。
您可以使用 apt 或 synaptic 包管理器安装 5.3.0-18。