Comment 3 for bug 1883785

Exacly the same issue on same Dell 3593, issue persist also on Linux Mint 20.04 (guess because it is based on Ubunu 20.04). Latest kernel.

Sometimes solved by enabling / disabling secure boot. Other times boot order Ubuntu/SSD, SSD/Ubuntu, unchecking SSD. Using recover kernel 5.40 mode/update grub.

On reboot it works every time.
On shut down....sometimes does not load OS after day/two or 4/5 days.