Same problem here on Ubuntu w/Dell 9310 and AX500 and 5.13.0-20 and -21.
Reverting to 5.13.0-19 resolved the issue. First reboot didn't fix the issue, but a full power cycle did.
I used a USB wifi dongle to install. Without that, you might need to grab the relevant dpkgs and put on a USB stick to update.
sudo apt install linux-headers-5.13.0-19 linux-headers-5.13.0-19-generic linux-image-5.13.0-19-generic linux-modules-5.13.0-19-generic linux-modules-extra-5.13.0-19-generic
Same problem here on Ubuntu w/Dell 9310 and AX500 and 5.13.0-20 and -21.
Reverting to 5.13.0-19 resolved the issue. First reboot didn't fix the issue, but a full power cycle did.
I used a USB wifi dongle to install. Without that, you might need to grab the relevant dpkgs and put on a USB stick to update.
sudo apt install linux-headers- 5.13.0- 19 linux-headers- 5.13.0- 19-generic linux-image- 5.13.0- 19-generic linux-modules- 5.13.0- 19-generic linux-modules- extra-5. 13.0-19- generic