To fix the “firmware: failed to load iwlwifi-8265-36.ucode” error when configuring Intel WiFi on Debian Linux, you can try the following steps:
- Make sure that the non-free firmware package is installed by running
apt-get install firmware-iwlwifi
- If the package is already installed, try reinstalling it by running
apt-get --reinstall install firmware-iwlwifi
- If step 1 and 2 does not work, try to update the package list by running
apt-get update
- If step 3 does not work, try to manually install the firmware by downloading it from the intel website and placing it in the /lib/firmware directory
- If none of the above steps work, try to update your kernel and check if the problem persist.