Comment 0 for bug 1886148

This is very similar to https://bugs.launchpad.net/bugs/1883040

Boxes that have failed to boot it are

dell [optiplex] 755 (c2d-e8300, 8gb, amd/ati radeon rv610/radeon hd2400 pro/xt)
dell [optiplex] 755 (c2d-e6850, 5gb, amd/ati radeon rv516/x1300/x1550)
hp dc7700 (c2d-e6320, 5gb, nvidia quadro nvs 290)
hp 8200 elite sff (i5-2400, 8gb, nvidia quadro 600)
sony vaio svp112a1cw (i5-9400u, 4gb, intel haswell-ULT)

I can't get md5sums because of errors at http://iso.qa.ubuntu.com/qatracker/milestones/413/builds/216043/downloads, so I just re-ran zsync to verify download & it confirms 100% downloaded, so I'm assuming that isn't at fault.

The ISO was written twice to two different thumb-drives. Same issue each time on same boxes.

On a number of boxes it’s wanting me to download aka https://bugs.launchpad.net/ubuntu-cdimage/+bug/1883040 however it’s done that on boxes not impacted by that bug, which makes me think thumb-drive/squashfs errs related. Also results of boot appeared different on varying boxes (inconsistent; dc7700 reported no thumb-drive; d755-5 also did that sometimes, sometimes it got to wanting to download - those two boxes were impacted by prior report; the remaining boxes were more consistent in response..; but if trouble reading data on thumb-drive then the slower boxes (dc7700/d755-5) may have more issues & thus be less consistent?)

Further I noted @leok has recorded a valid test today which means a real issue is unlikely (this severe anyway), thus thumb-drives & me (operator error) not ruled out.

I'll file this as a bug report so I can close my failed QA-tests, but I'm considering changing the status to 'incomplete', and re-testing tomorrow, OR it needs me to re-write ISO from a different box to a third-thumb-drive as I don't think I've ruled out media issues given Leok's report.