By enabling ramfb when using vgpu with display=on we can prevent getting blank consoles when the vgpu driver is not loaded [1]. The idea here is that when 'nodisplay' is not specified (i.e., display=on) to also enable ramfb. The video device would remain with model.type=none as we do already. Need to pay attention to the cluster levels in which we can do this (compatibility versions 4.5 and 4.6 - see bz 1679680). The handling of the 'nodisplay' argument should stay as is (as fallback). [1] https://www.kraxel.org/blog/2019/02/ramfb-display-in-qemu/
Verification builds: ovirt-engine-4.4.7.1-0.9.el8ev vdsm-4.40.70.2-1.el8ev.x86_64 qemu-kvm-5.2.0-16.module+el8.4.0+10806+b7d97207.x86_64 libvirt-daemon-7.0.0-14.module+el8.4.0+10886+79296686.x86_64 NVIDIA-vGPU-rhel-8.4-460.73.02.x86_64 Verification scenario: Polarion test case added to links section.
This bugzilla is included in oVirt 4.4.7 release, published on July 6th 2021. Since the problem described in this bug report should be resolved in oVirt 4.4.7 release, it has been closed with a resolution of CURRENT RELEASE. If the solution does not work for you, please open a new bug report.