On 27 Jan 2020, at 22:01, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:

Hello, in oVirt 4.3.7 in "Edit VM" -> System -> Advanced parameters I can choose

Bios Type: Default Q35 Chipset with Legacy BIOS Q35 Chipset with UEFI BIOS Q35 Chipset with SecureBoot

and Custom Emulated Machine: Use cluster default (pc-i440fx-rhel7.6.0) ... q35 pc-q35-rhel7.3.0 pc-q35-rhel7.4.0 pc-q35-rhel7.5.0 pc-q35-rhel7.6.0

and I can apparently mix all possible values.

you can, but they won’t work:) in 4.3 the whole q35 is tech preview, with bugs we’ve fixed in 4.4. custom emulated machine is really just for the cases where you can troubleshoot by trying a “similar enough” machine type. using a different chipset or type from different major version will likely just fail on vm start.

Any deeper information about implications? What is the "Default" value for Bios Type?

i440fx with seabios(Legacy BIOS)

Did anything change in 4.3.8 (eg official support for q35)?

no, only in 4.4 where q35/seabios becomes the new default for new 4.4 clusters

I search also through official docs for RHV 4.3 (virtual mgmt guide, appendix A), but for example I don't find any reference to the "Bios Type" parameter and a vague reference to the "Custom Emulated Machine". Is there any more detailed link?

there should be a bit more about bios, since it’s becoming a default, but don’t ahve it in front of me/at hand at the moment, sorry Thanks, michal

Thanks, Gianluca _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/site/privacy-policy/ oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/RBXYGBA6MBUYUR...