I have a new Dell XPS 8950 desktop, running Windows 11. It does not have an internal optical drive.
I purchased a USB optical CD/DVD (LG), and it works fine when I need to read or write.
I have Ubuntu loaded on a USB stick, and I am able to boot from it. (Secure Boot is disabled.) I use the live version.
I also have Ubuntu on a CD, and I'd like to boot to Ubuntu from it. But, I put the Ubuntu CD in the USB drive, and press F12, but the CD doesn't show up. (The USB Ubuntu stick does.)
Is it not possible to boot this Dell machine from a USB CD? It does boot from a USB flash drive (stick)?