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Ubuntu 18.04 LTS：内核更新后 Wifi 无法使用

tag-icon • tag-icon kernel 18.04 iwlwifi
Ubuntu 18.04 LTS：内核更新后 Wifi 无法使用

戴尔笔记本电脑安装的是 Ubuntu 18.04 LTS 版本，内核更新后4.15.0-24-通用从 4.15.0-23-generic 开始，wifi 无法使用。设置菜单下不显示 Wifi。

串行通信

00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 0b)
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 0b)
00:14.0 USB controller: Intel Corporation 8 Series USB xHCI HC (rev 04)
00:16.0 Communication controller: Intel Corporation 8 Series HECI #0 (rev 04)
00:1b.0 Audio device: Intel Corporation 8 Series HD Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 3 (rev e4)
00:1c.3 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 4 (rev e4)
00:1c.4 PCI bridge: Intel Corporation 8 Series PCI Express Root Port 5 (rev e4)
00:1d.0 USB controller: Intel Corporation 8 Series USB EHCI #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 8 Series LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 8 Series SMBus Controller (rev 04)
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller (rev 07)
02:00.0 Network controller: Intel Corporation Wireless 3160 (rev 83)
03:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon R7 M260/M265 / M340/M360 / M440/M445]

答案1

升级到 4.15.0-24 后，我遇到了同样的问题，wifi 无法正常工作。在 MacBook 上运行 16.04.3。我不得不退回到内核 4.13.0-45

看起来 4.15.0-24 也存在更大的问题。 https://bugs.launchpad.net/ubuntu/bionic/+source/linux/+bug/1779827

答案2

使用命令

sudo apt install --reinstall bcmwl-kernel-source

如果你使用 Wifi，请确保在升级内核后立即执行此操作，并在重启电脑之前执行此操作，否则你将需要有线互联网连接才能重新安装

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