Great…
I rarely boot ISOs on a motion computing device I have because it means 9+ minutes of seeing nothing but black screen during the boot (boring!)
The issue is a firmware bug that exists in a small variety of devices that makes installing a new OS take an extra 10 minutes, so hardly a big deal, but sure is noticeable if using the device to test booting ISOs. The ISO can be reformatted to make it boot 8+ minutes faster, alas the ISO then can’t be used to boot on other machines, so I’d not recommend it.
I also hit it on another box that also has the firmware bug (this one a lenovo) but it’s a non-compliance issue within the firmware where the OEM/maker didn’t care as the OS the device was sold with was pre-installed.
We’ve documented the issue here
and that’s sufficient in my view. It impacts less than 1 in 5000 boxes (specific firmware code get triggered). Maybe the 22.04 in that link needs to be made less jammy specific.