wifi not working after kernel update to 5.13.0-27-generic in Ubuntu 20.04

My laptop is HP PROBOOK with Ubuntu 20.04 installed. Last day my system kernel got updated to 5.13.0-27-generic and after that, I am not able to connect to wifi. The LAN connection is working fine but the wifi connectivity issue is there. Following is the kernel detail -

Linux version 5.13.0-27-generic (buildd@lgw01-amd64-045) (gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #29~20.04.1-Ubuntu SMP Fri Jan 14 00:32:30 UTC 2022

It used to work fine before taking the update, but suddenly after the restart, this issue has arrived.

I am not sure whether my drivers are missing or something went wrong with the wifi adapter.

In case of missing drivers where to get these drivers from and same with wifi adapter.

dkms status throws the following result

rtl8821ce, v5.5.2_34066.20200325, 5.13.0-27-generic, x86_64: installed
rtl8821ce, v5.5.2_34066.20200325, 5.4.0-96-generic, x86_64: installed
rtl88x2bu, 5.8.7.1, 5.13.0-27-generic, x86_64: installed
virtualbox, 6.1.26, 5.11.0-46-generic, x86_64: installed
virtualbox, 6.1.26, 5.13.0-27-generic, x86_64: installed
virtualbox, 6.1.26, 5.4.0-96-generic, x86_64: installed

sudo lshw -C network

*-network:0               
       description: Wireless interface
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       logical name: wlp0s20f3
       version: 20
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-22-generic firmware=59.601f3a66.0 QuZ-a0-jf-b0-59.u ip=192.168.1.4 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: iomemory:600-5ff irq:16 memory:600324c000-600324ffff
  *-network:1
       description: Ethernet interface
       product: Ethernet Connection (13) I219-V
       vendor: Intel Corporation
       physical id: 1f.6
       bus info: pci@0000:00:1f.6
       logical name: enp0s31f6
       version: 20
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=e1000e driverversion=5.11.0-22-generic firmware=0.6-4 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:143 memory:54100000-5411ffff
  *-network
       description: Ethernet interface
       physical id: 2
       logical name: veth4fc7862
       size: 10Gbit/s
       capabilities: ethernet physical
       configuration: autonegotiation=off broadcast=yes driver=veth driverversion=1.0 duplex=full link=yes multicast=yes port=twisted pair speed=10Gbit/s

lspci -nn

00:00.0 Host bridge [0600]: Intel Corporation Device [8086:9a14] (rev 01)
00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:9a49] (rev 01)
00:04.0 Signal processing controller [1180]: Intel Corporation Device [8086:9a03] (rev 01)
00:0a.0 Signal processing controller [1180]: Intel Corporation Device [8086:9a0d] (rev 01)
00:0d.0 USB controller [0c03]: Intel Corporation Device [8086:9a13] (rev 01)
00:0e.0 RAID bus controller [0104]: Intel Corporation Volume Management Device NVMe RAID Controller [8086:9a0b]
00:14.0 USB controller [0c03]: Intel Corporation Device [8086:a0ed] (rev 20)
00:14.2 RAM memory [0500]: Intel Corporation Device [8086:a0ef] (rev 20)
00:14.3 Network controller [0280]: Intel Corporation Device [8086:a0f0] (rev 20)
00:15.0 Serial bus controller [0c80]: Intel Corporation Device [8086:a0e8] (rev 20)
00:16.0 Communication controller [0780]: Intel Corporation Device [8086:a0e0] (rev 20)
00:1d.0 PCI bridge [0604]: Intel Corporation Device [8086:a0b0] (rev 20)
00:1f.0 ISA bridge [0601]: Intel Corporation Device [8086:a082] (rev 20)
00:1f.3 Multimedia audio controller [0401]: Intel Corporation Device [8086:a0c8] (rev 20)
00:1f.4 SMBus [0c05]: Intel Corporation Device [8086:a0a3] (rev 20)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Device [8086:a0a4] (rev 20)
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (13) I219-V [8086:15fc] (rev 20)
01:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd Device [144d:a809]

lspci -nnk | grep 0280 -A3

00:14.3 Network controller [0280]: Intel Corporation Device [8086:a0f0] (rev 20)
    Subsystem: Intel Corporation Device [8086:0034]
    Kernel driver in use: iwlwifi
    Kernel modules: iwlwifi

ls -al /lib/firmware/*.pnvm

-rw-r--r-- 1 root root 41804 Jan 10 15:49 /lib/firmware/iwlwifi-so-a0-gf-a0.pnvm
-rw-r--r-- 1 root root 27456 Jan 10 15:49 /lib/firmware/iwlwifi-ty-a0-gf-a0.pnvm

modinfo iwlwifi | grep -i a0f0

alias:          pci:v00008086d0000A0F0sv*sd*bc*sc*i*

ls -al /lib/firmware/*pnvm*

-rw-r--r-- 1 root root 41804 Jan 10 15:49 /lib/firmware/iwlwifi-so-a0-gf-a0.pnvm.HOLD
-rw-r--r-- 1 root root 27456 Jan 10 15:49 /lib/firmware/iwlwifi-ty-a0-gf-a0.pnvm.HOLD

I had the same issue, so a couple of days of Googling, it is working now.

You need to update the GRUB.

Easy solution: Go to Ubuntu Software Center and search for "grub customizer" Click the General Settings tab under "default entry" select "predefined" button and from the drop down chose the older version. I chose "5.11.0-46-generic" (this new kernel broke my wifi "5.13.0-27-generic") click the save button restart the system, it should work.

slightly difficult solution:

If you do not want to install grub customizer and want to modify the grub by your self, enter the command in terminal to open the grub file:

sudo gedit /etc/default/grub

Now in the gedit remove or comment out this line: GRUB_DEFAULT=0

and add these two lines

GRUB_DEFAULT="Advanced options for Ubuntu>Ubuntu, with Linux 5.11.0-46-generic" GRUB_SAVEDEFAULT="false"

save the grub file.

run the command to update the grub sudo update-grub

restart the system, it should work.

Note: 5.11.0-46-generic was the version where my wifi was last working, for you it might be a different version, please check your system.

Same problem, same (temporary) fix (downgrading), however with an MSI laptop.
Here's output for the (working) xyz.96 kernel:

dkms status

nvidia, 460.91.03, 5.4.0-96-generic, x86_64: installed nvidia, 460.91.03, 5.4.0-97-generic, x86_64: installed

lspci -nn

00:00.0 Host bridge [0600]: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers [8086:3ec4] (rev 07) 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) 00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 630 (Mobile) [8086:3e9b] 00:12.0 Signal processing controller [1180]: Intel Corporation Cannon Lake PCH Thermal Controller [8086:a379] (rev 10) 00:14.0 USB controller [0c03]: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller [8086:a36d] (rev 10) 00:14.2 RAM memory [0500]: Intel Corporation Cannon Lake PCH Shared SRAM [8086:a36f] (rev 10) 00:14.3 Network controller [0280]: Intel Corporation Wireless-AC 9560 [Jefferson Peak] [8086:a370] (rev 10) 00:16.0 Communication controller [0780]: Intel Corporation Cannon Lake PCH HECI Controller [8086:a360] (rev 10) 00:17.0 SATA controller [0106]: Intel Corporation Cannon Lake Mobile PCH SATA AHCI Controller [8086:a353] (rev 10) 00:1d.0 PCI bridge [0604]: Intel Corporation Cannon Lake PCH PCI Express Root Port #9 [8086:a330] (rev f0) 00:1d.6 PCI bridge [0604]: Intel Corporation Cannon Lake PCH PCI Express Root Port #15 [8086:a336] (rev f0) 00:1f.0 ISA bridge [0601]: Intel Corporation HM470 Chipset LPC/eSPI Controller [8086:a30d] (rev 10) 00:1f.3 Audio device [0403]: Intel Corporation Cannon Lake PCH cAVS [8086:a348] (rev 10) 00:1f.4 SMBus [0c05]: Intel Corporation Cannon Lake PCH SMBus Controller [8086:a323] (rev 10) 00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller [8086:a324] (rev 10) 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP106M [GeForce GTX 1060 Mobile] [10de:1c20] (rev a1) 01:00.1 Audio device [0403]: NVIDIA Corporation GP106 High Definition Audio Controller [10de:10f1] (rev a1) 02:00.0 Non-Volatile memory controller [0108]: Sandisk Corp WD Black 2018/PC SN520 NVMe SSD [15b7:5003] (rev 01) 03:00.0 Ethernet controller [0200]: Qualcomm Atheros QCA8171 Gigabit Ethernet [1969:10a1] (rev 10)

lshw -C network

WARNING: you should run this program as super-user. *-network
description: Wireless interface product: Wireless-AC 9560 [Jefferson Peak] vendor: Intel Corporation physical id: 14.3 bus info: pci@0000:00:14.3 logical name: wlo1 version: 10 serial: 1c:1b:b5:d3:b9:fe width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical wireless configuration: broadcast=yes driver=iwlwifi driverversion=5.4.0-96-generic firmware=46.4d093a30.0 ip=192.168.0.249 latency=0 link=yes multicast=yes wireless=IEEE 802.11 resources: irq:16 memory:a4414000-a4417fff *-network description: Ethernet interface product: QCA8171 Gigabit Ethernet vendor: Qualcomm Atheros physical id: 0 bus info: pci@0000:03:00.0 logical name: enp3s0 version: 10 serial: 00:d8:61:05:0b:f0 capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=alx latency=0 link=no multicast=yes port=twisted pair resources: irq:18 memory:a4200000-a423ffff ioport:3000(size=128) *-network description: Ethernet interface physical id: 1 bus info: usb@1:1.4 logical name: enx00e04c680735 serial: 00:e0:4c:68:07:35 size: 10Mbit/s capacity: 1Gbit/s capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8152 driverversion=v1.10.11 duplex=half link=no multicast=yes port=MII speed=10Mbit/s WARNING: output may be incomplete or inaccurate, you should run this program as super-user.