*Edited after super helpful chat with @chili555 that I botched by trying too many things at the same time...
The WiFi adapter works in kernel 5.13.0.20-generic, but in 5.13.0-21 it's inactive and remains inactive after multiple shutdowns/ reboots. I checked that it's active in BIOS and it exists but does not work
$ lshw -c network *-network description: Network controller product: QCA6390 Wireless Network Adapter [AX500-DBS (2x2)] vendor: Qualcomm physical id: 0 bus info: pci@0000:72:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: driver=ath11k_pci latency=0 resources: irq:182 memory:a2500000-a25fffff $ lspci | grep Qualcomm 72:00.0 Network controller: Qualcomm QCA6390 Wireless Network Adapter [AX500-DBS (2x2)] (rev 01) $ sudo modprobe ath11k_pci $ sudo dmesg | grep ath [ 4.611544] ath11k_pci 0000:72:00.0: BAR 0: assigned [mem 0xa2500000-0xa25fffff 64bit] [ 4.611573] ath11k_pci 0000:72:00.0: enabling device (0000 -> 0002) [ 4.612103] ath11k_pci 0000:72:00.0: qca6390 hw2.0 [ 10.337672] ath11k_pci 0000:72:00.0: failed to register fw indication: -110 [ 10.337692] ath11k_pci 0000:72:00.0: failed to send qmi firmware indication: -110 [ 39.931711] ath11k_pci 0000:72:00.0: link down error during global reset [ 45.574642] ath11k_pci 0000:72:00.0: BAR 0: assigned [mem 0xa2500000-0xa25fffff 64bit] [ 45.575668] ath11k_pci 0000:72:00.0: qca6390 hw2.0 [ 45.630047] ath11k_pci 0000:72:00.0: failed to set pcie link register 0x01e0c0ac: 0xffffffff != 0x00000010 [ 45.630054] ath11k_pci 0000:72:00.0: failed to set sysclk: -110 [ 45.650253] ath11k_pci 0000:72:00.0: link down error during global reset $ rfkill list all 0: hci0: Bluetooth Soft blocked: no Hard blocked: no It is not present in networkmanager or ifconfig, Bluetooth works though which I believe is the same device. Super thankful for any ideas.
The ax500 device works in the 5.13.0-20-generic kernel with
$ sudo dmesg | grep ath [ 4.804410] ath11k_pci 0000:72:00.0: BAR 0: assigned [mem 0xa2500000-0xa25fffff 64bit] [ 4.804440] ath11k_pci 0000:72:00.0: enabling device (0000 -> 0002) [ 4.808036] ath11k_pci 0000:72:00.0: qca6390 hw2.0 [ 5.085678] ath11k_pci 0000:72:00.0: chip_id 0x0 chip_family 0xb board_id 0xff soc_id 0xffffffff [ 5.085684] ath11k_pci 0000:72:00.0: fw_version 0x101c06cc fw_build_timestamp 2020-06-24 19:50 fw_build_id [ 5.258202] ath11k_pci 0000:72:00.0 wlp114s0: renamed from wlan0 [ 351.080712] ath11k_pci 0000:72:00.0: link down error during global reset [ 356.511270] ath11k_pci 0000:72:00.0: BAR 0: assigned [mem 0xa2500000-0xa25fffff 64bit] [ 356.512356] ath11k_pci 0000:72:00.0: qca6390 hw2.0 1 Answer
This works again with the now released kernel 5.13.0-22.
sudo apt update sudo apt upgrade sudo reboot and if you never want to see this again:
sudo apt purge linux-headers-5.13.0-21 linux-headers-5.13.0-21-generic linux-image-5.13.0-21-generic linux-modules-5.13.0-21-generic linux-modules-extra-5.13.0-21-generic 
