Oh oh, I just reproduced the problem on a desktop tower, a Dell Precision T3610, probably 2019 vintage. The only thing in common with the old laptop, that I can think of, is that both use the legacy BIOS. The Dell has EFI but the graphics card may not support that; there is no integrated graphics, if I switch to EFI and lose the video I may not be able to switch back. Recommend some testing on boxes with legacy BIOS. --PA
