Enabling Ubuntu's TPM encryption switches you to a snap kernel that blocks deb kernel packages

TL;DR: Rediscovering that on Ubuntu 24.04 and 26.04, ticking &ldquo;Use hardware-backed disk encryption&rdquo; in the installer silently gives you a snap-based system (snap kernel and bootloader, like Ubuntu Core) instead of a normal deb-based one. On a modern laptop, this can breaks hardware enablement, in my case the webcam, with no supported way to fix it or have an equivalent feature set. I…