No WiFi Adapter Found with fresh Ubuntu 20.04 install on MSI GE66 Laptop, and other strange behavior

I installed a fresh Ubuntu 20.04.2 image to my MSI GE66 laptop. When I go to Settings > Wi-Fi it says "No Wi-Fi Adapter Found".

Additionally, there appears to be other strange glitchy behavior going on, but I created a different question regarding that.

Running sudo lshw -C network outputs the following:

  *-network UNCLAIMED       
       description: Network controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:04:00.0
       version: 1a
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix cap_list
       configuration: latency=0
       resources: memory:c4500000-c4503fff
  *-network
       description: Ethernet interface
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:05:00.0
       logical name: enp5s0
       version: 03
       serial: 2c:f0:5d:b4:bb:26
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=igc driverversion=0.0.1-k duplex=full ip=10.216.156.136 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:18 memory:c4200000-c42fffff memory:c4300000-c4303fff

The output of lspci is:

00:00.0 Host bridge: Intel Corporation Device 9b44 (rev 02)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 02)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 05)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 02)
00:12.0 Signal processing controller: Intel Corporation Comet Lake PCH Thermal Controller
00:14.0 USB controller: Intel Corporation Comet Lake USB 3.1 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Comet Lake PCH Shared SRAM
00:15.0 Serial bus controller [0c80]: Intel Corporation Comet Lake PCH Serial IO I2C Controller #0
00:15.2 Serial bus controller [0c80]: Intel Corporation Comet Lake PCH Serial IO I2C Controller #2
00:16.0 Communication controller: Intel Corporation Comet Lake HECI Controller
00:1b.0 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #17 (rev f0)
00:1d.0 PCI bridge: Intel Corporation Comet Lake PCI Express Root Port #9 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Device 06b4 (rev f0)
00:1d.6 PCI bridge: Intel Corporation Device 06b6 (rev f0)
00:1d.7 PCI bridge: Intel Corporation Device 06b7 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Comet Lake LPC Controller
00:1f.3 Audio device: Intel Corporation Comet Lake PCH cAVS
00:1f.4 SMBus: Intel Corporation Comet Lake PCH SMBus Controller
00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake PCH SPI Controller
01:00.0 VGA compatible controller: NVIDIA Corporation Device 249c (rev a1)
01:00.1 Audio device: NVIDIA Corporation Device 228b (rev a1)
02:00.0 USB controller: ASMedia Technology Inc. Device 3242
03:00.0 Non-Volatile memory controller: Sandisk Corp Device 5006
04:00.0 Network controller: Intel Corporation Device 2725 (rev 1a)
05:00.0 Ethernet controller: Intel Corporation Device 3101 (rev 03)
06:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)

Here is what I've tried to do to fix the problem:

First I disabled secure boot in BIOS before I installed Ubuntu 20.04 b/c I've heard that can sometimes cause issues.

Next, I ran the following commands followed by a reboot:

sudo apt-get install --reinstall bcmwl-kernel-source

That didn't do the trick. I'm not sure what else to try from here, I don't have much experience solving problems like this.

Solution 1:

Thank you @Charles Green for the answer. For those facing the same issue, this is how you'd go about solving it.

The full instructions are posted here

Basically you need to install the drivers for the Killer AX1650 card. Simply running these commands did not work:

sudo add-apt-repository ppa:canonical-hwe-team/backport-iwlwifi
sudo apt-get update
sudo apt-get install backport-iwlwifi-dkms
sudo reboot

Instead, what worked for me is running the following commands:

sudo apt update
sudo apt-get install -y git
sudo apt-get install -y build-essential

git clone git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
cd linux-firmware
sudo cp iwlwifi-* /lib/firmware/
cd ..

git clone https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/backport-iwlwifi.git
cd backport-iwlwifi
make defconfig-iwlwifi-public
make -j4
sudo make install
 
sudo update-initramfs -u
sudo reboot