Comment 97 for bug 1886148

Ubuntu groovy desktop amd64 daily of 20200912 fails to boot when written with

sudo dd bs=4M oflag=sync status=progress of=/dev/sdb if=/de2900/ubuntu_64/groovy-desktop-amd64.iso

on

hp dc7700 (c2d-e6320, 5gb, nvidia quadro nvs 290)
dell [optiplex] 755 (c2d-e8300, 8gb, amd/ati radeon rv610/radeon hd2400 pro/xt)
dell [optiplex] 780 (c2q-q9400, 8gb, amd/ati cedar radeon hd 5000/6000/7350/8350)
lenovo thinkpad sl510 (c2d-t6570, 2gb ram, i915)
lenovo thinkpad x201 (i5-m520, 4gb, i915)

but will boot on UEFI enabled boxes (messages differed on various boxes, some I saw none, thinkpad sl510 was "Operating System not found". I didn't test other boxes