i'm having an issue with zorin 16 lite and booting into a live cloned os of my personalized z16 lite.
i've built z16 lite with some customization and i used clonezilla to clone that to a usb drive so i can copy to my fleet of computers. i'm having no trouble doing this. it's been smooth cloning from the computer to the usb drive and from the usb drive to the computer. i've tested on a handful of computers and no issues with this part of the process. but i ran into a problem when i tried to boot into my live usb clone of z16 lite to run updates and make a few changes on one of the computers i had upgraded to z16 lite from z15.3 lite. and i've been running this process with 15.3 lite for a few years and never had this issue.
list out what i've tested:
below "computer" is the same computer that i've run this test maybe 10 times - minisforum n40 (not their newer n4020 model). each computer was wiped after each test and tried again. and i've also used numerous computers of the same model and a few other models to run the tests twice. all the computers are pentinum or celeron fanless pcs. and i when i talk about "booting into" i mean from the computers bios/uefi menu not grub. this problem happened in all the computers i tested.
i have verified that the usb ports are working fine. i know the usb clones are working fine. i know the usb installers are working fine. and i know the live clonezilla usb drive is working fine.
computer with 15.3 lite installed - when i plug in my clone to live boot into it, it boots right up whether it's a clone of 15.3 lite or 16 lite. so i'm able to make changes in my live clone.
computer with 16 lite installed - when i plug in the clone of 15.3 lite it boots right to my live clone. when i plug in the clone of 16 lite, it does not see it in the boot menu.
computer with xubuntu 20.04.3 installed - when i plug in my clone to live boot into it, it boots right up whether it's a clone of 15.3 lite or 16 lite. so i'm able to make changes in my live clone. i wanted to run this test to see if it was something with the base ubuntu 20 having this problem. it didn't, xubuntu 20 let me boot right into my live usb clone os.
so the tests with zorin were tested with my full clone copied to the hard drive of both z15 and z16, so all my tweaks were installed on the computer. but i also ran these tests with a clean install of both versions of zorin from the .iso installer, so it was a complete default build of zorin and the same situations happened. z16 lite was the only one that wouldn't let me boot into my live version of just my cloned usb of z16 lite.
i've been doing the clone process with clonezilla on zorin 15 lite for many years, but also a few different versions of ubuntu and other versions for years before that. i've never had this problem of not being able to boot into my live cloned os from the computer boot menu... unless it was a bad drive or bad usb port or a bad .iso. and all of those things i have verified are working fine in these tests. i've completely isolated this issue to be related to z16 lite installed on my computers, whether it's my cloned z16 or a clean copy of z16 installed.
so with all the factors it seems like z16 lite is the problem. i don't know if it's how it writes to grub or something in the os partition. but something is going on that i can't replicate unless z16 lite is installed.