Ubuntu 20.04 Killer AX500s DBS drivers support

After reading available pages with keywords similar to those included in topic I decided to ask a question since I really don't know what to do.

Few days ago I bought new DELL XPS 15 9500 (i9 version) with network adapter Killer AX500s DBS. Wifi and bluetooth isn't visible at all on Ubuntu 20.04[.1] and default kernel 5.4.x. I tried to install the drivers, changed kernels (even to 5.9) but no luck - in last case bluetooth icon appeared but wasn't working properly (even turning it on was failing, if managed to turn it on - couldn't connect to my mouse). I found out that mentioned network adapter is currently not supported:

• certification notes (XPS 13 wth the same module) https://certification.ubuntu.com/hardware/201910-27450
• tracking and additional articles https://www.raxcrucible.com/posts/dell_xps15_9500/

My question is: Does anyone know if it will be supported soon or ever (I have to decide if I should return new computer - time is limited here)? If no - where should I ask for it? I'm really confused about it and don't know if it's worth to wait.

I found out there is some driver - https://github.com/kvalo/ath11k-firmware Does someone tried to install it manually (how? It's last thing I didn't try) and did it work?

output from lspci

6c:00.0 Network controller [0280] Qualcomm Device [17cb:1101] (rev 01)
Subsystem Bigfoot Networks, Inc. Device [1a56:a501]

I just found out there is support for AX500s DBS in the "linux-firmware" package ver 1.187.7, which is currently in ubuntu proposed: https://launchpad.net/ubuntu/+source/linux-firmware/1.187.7

I can confirm I'm now running Ubuntu 20.04.1 on XPS 13 9310 (late 2020), connected via the AX500s DBS Wifi.

To get the wifi card recognised, I had to:

# sudo apt install linux-oem-20.04-edge # installs kernel version 5.10.0-1008-oem
# sudo apt install linux-firmware=1.187.7 # from ubuntu proposed, which I temporarily enabled

The issue related to Killer ax500 was resolved by updating the kernel to the version 5.10.3. I am using ubuntu 20.04 and the wifi and Bluetooth are working perfectly. All the best

I have wifi functional on my XPS 15 9500 i9 (side note: I am running 20.10 not 20.04, so results may very).

I was first looking into this article that claimed to solve the issue: https://medium.com/@tomas.heiskanen/dell-xps-15-9500-wifi-on-ubuntu-20-04-d5f1c218e78a, however I found it odd that the linked LKML page said this was added in kernel v5.10-rc2 while v5.10.4 is out.

So first, I updated my kernel to 5.10.4: https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.10.4/

Then, as referenced on LKML https://lkml.org/lkml/2020/9/14/964, I cloned https://github.com/kvalo/ath11k-firmware and copied the firmware files to the appropriate directory:

sudo mkdir -p /lib/firmware/ath11k/QCA6390/hw2.0/
sudo cp QCA6390/hw2.0/WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1/*.bin /lib/firmware/ath11k/QCA6390/hw2.0/
sudo cp QCA6390/hw2.0/WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1/bdwlan.e04 /lib/firmware/ath11k/QCA6390/hw2.0/board.bin

After that I restarted my computer and had the ability to connect to wifi networks.

I'm following this issue for more than 7 months now since I got my Dell XPS 9500, with a Killer Wifi 6 AX500-DBS card. I was able to use it by upgrading to Ubuntu 20.04.2 running on Linux kernel 5.11.