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Differences between 20.04 and 21.10 boot images

cn flag
Ant

I try to install Ubuntu on quite new Dell laptops. If I write a bootable USB drive from 21.10 image I cannot boot. I get an EFI error "invalid parameter". But 20.04 image written with same tools on same computer (running 20.04) works ok. What do I do wrong?

Ant

ChanganAuto avatar
us flag
Probably the ISO is corrupt.
pasman pasmański avatar
mx flag
Ubuntu iso supports BIOS boot too. Does it work ?
Ant avatar
cn flag
Ant
That ISO works on other computers. So probably not...
us flag
What is the exact error that you get? Can you post a screenshot?
guiverc avatar
cn flag
Ubuntu is created for many architectures, and recent releases have adjusted how *live* media is booted so all architectures boot the same identical way for a given release; meaning 21.10/impish media will boot differently to 20.04/focal. You've possibly done nothing wrong if you've verified the ISO (https://tutorials.ubuntu.com/tutorial/tutorial-how-to-verify-ubuntu#0) & it booted on other identical computers; the second test is invalid/incomplete if other machines contained different hardware components - unless you verified the validation of media - so did you? Did the verification complete?
guiverc avatar
cn flag
FYI: I usually use two other boxes (*one of similar hardware & one rather different*) to verify the media itself is complete (not just one successful boot & media scan; the self-validation report can be seen with `journalctl`)
heynnema avatar
ru flag
Check your BIOS with `sudo dmidecode -s bios-version`. See if there's a newer one available.
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