Public bug reported:
For a system test I prepared a USB stick with the current focal iso,
booted from it and attempted an install to another (identical) USB disk.
During partitioning /dev/sdb (the USB disk) was picked as target for the
bootloader installation,
a 63GB ext4 partition for / and a 1GB swap partition were created.
The install went flawless.
After finishing my testing I removed all USB keys and rebooted to find
out i am now greeted with a grub input prompt and have no way to boot
off the internal NVME disk anymore...
Plugging in the target USB stick that was used to install focal to gives
me a proper grub menu allowing me to select to boot the NVME
installation. So i can only boot with plugged in USB now, without it i
end up at a grub input prompt ...
** Affects: ubiquity (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1872736
Title:
install from USB to USB device wipes grub setup on NVME disk
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