从 18.04 升级到 19.10 后出现“未找到 Wi-Fi 适配器”

从 18.04 升级到 19.10 后出现“未找到 Wi-Fi 适配器”

我对 Ubuntu 和 Linux 还不是很熟悉。我使用的是 Dell XPS 13" 7390,出厂时已安装 18.04。通过 GUI 提示从 18.04 升级到 19.10,重启后 Wi-Fi 就没了。

以下是输出lspci -knn | grep Net -A3

55:02:00.0 Network controller [0280]: Intel Corporation Device [8086:2723] (rev 1a)
56: Subsystem: Bigfoot Networks, Inc. Device [1a56:1653]
57- Kernel modules: iwlwifi
58-03:00.0 PCI bridge [0604]: Intel Corporation JHL6540 Thunderbolt 3 Bridge (C step) [Alpine Ridge 4C 2016] [8086:15d3] (rev 02)
59- Kernel driver in use: pcieport

这是输出rfkill list

0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

我也尝试禁用 802.11n,但没有帮助。

任何帮助都将不胜感激!

编辑并尝试了其他命令:

sudo modprobe iwlwifi失败并显示消息modprobe: ERROR: could not insert 'iwlwifi': Exec format error。添加--force标志不会改变这一点。

uname -r(这是 Linux 内核版本,对吗?)输出/返回4.15.0-1081-oem

modinfo iwlwifi | grep filename印刷filename: /lib/modules/4.15.0-1081-oem/updates/dkms/iwlwifi.ko

sudo dpkg -s backport-iwlwifi-dkms输出如下:

Package: backport-iwlwifi-dkms
Status: install ok installed
Priority: optional
Section: kernel
Installed-Size: 9599
Maintainer: Ubuntu Developers <[email protected]>
Architecture: all
Version: 7906-0ubuntu4
Provides: iwlwifi-modules
Depends: dkms (>= 2.1.0.0), libc6-dev | libc-dev
Description: iwlwifi driver backport in DKMS format
 Intel works with periodic releases of the iwlwifi driver that are
 tested with a specific combination of components such as firmware and
 hostap. These releases can be seen as snapshots of the development
 trees (including upstream) that can be used on older kernels.
 .
 This package provides iwlwifi modules built from iwlwifi-public
 defconfig based on upstream master branch.
Original-Maintainer: You-Sheng Yang <[email protected]>
Homepage: https://gitlab.com/vicamo/backport-iwlwifi-dkms
Modaliases: cfg80211(net-pf-16-proto-16-family-nl80211), iwlwifi(pci:v00008086d00007AF0sv*sd00000A10bc*sc*i*, 

这个Modaliases:过程持续了相当长一段时间(文件总大小约为 32kb)。

dmesg | grep iwl也不打印任何东西。

答案1

我建议您尝试删除反向移植包。

sudo apt purge backport-iwlwifi-dkms

重启。

有改善吗?

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