Unable to get wifi adapter working - clean 19.04 install - network unclaimed

A newer version of iwlwifi can be installed that includes your device and, crucially, the exact subsystem. With a working internet connection by ethernet, tethering or whatever means possible, open a terminal and do:

sudo apt update
sudo apt install git build-essential
git clone https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/backport-iwlwifi.git
cd backport-iwlwifi/
make defconfig-iwlwifi-public
sed -i 's/CPTCFG_IWLMVM_VENDOR_CMDS=y/# CPTCFG_IWLMVM_VENDOR_CMDS is not set/' .config
make -j4
sudo make install
sudo modprobe iwlwifi

I am not certain that the firmware is included in the latest version of linux-firmware. If your device doesn't start working immediately, check the log for messages and we'll then address the firmware if it's missing.

dmesg | grep iwl

According to these articles, support for this card is in kernel 5.1.*.

https://www.phoronix.com/scan.php?page=news_item&px=Intel-WiFi-6-AX200-Cyclone-Peak

"The product page does list Linux support that comes as little surprise these days. In fact, back in January we wrote about Linux support for these new Intel adapters within the "IWLWIFI" driver and that enablement is now present in the Linux 5.1 kernel."

https://www.phoronix.com/scan.php?page=news_item&px=Intel-IWLWIFI-22260-WiFI-Linux

"The Intel WiFi Linux driver "IWLWIFI" will see support for various new WiFi adapters with the upcoming Linux 5.1 kernel cycle."

These kernels can be downloaded from https://kernel.ubuntu.com/~kernel-ppa/mainline/, or by using ukuu $12, from https://teejeetech.in/ukuu/

stolen from here : https://unix.stackexchange.com/a/518577/228658 since can't mark as duplicate of a unix stack exchange page :

According to the product page it's a pre-certified solution and the driver has not been published yet.

Even Linus's Development branch doesn't reveal anything so I'm assuming that at the time of this writing, it's not Linux compatible yet and the article you're referring to uses marketing speak for: We'll be adding that soon...