I checked with 20.04 and it appears that recent Ubuntu live CDs don't have boot=casper anymore; they do still have initrd=/casper/initrd; but anyway, ^/cow should be fine (sorry I hadn't noticed the ^ there before).
Thank you for your work in this.
I checked with 20.04 and it appears that recent Ubuntu live CDs don't have boot=casper anymore; they do still have initrd= /casper/ initrd; but anyway, ^/cow should be fine (sorry I hadn't noticed the ^ there before).
Thank you for your work in this.