VM cannot run normally in kvm UEFI LEGACY mode #4245

ISSUE TYPE

• Bug Report

COMPONENT NAME

KVM 
UEFI

CLOUDSTACK VERSION

4.14.0.0

CONFIGURATION

OS / ENVIRONMENT

Hypervisor: CentOS7.6
Compiled against library: libvirt 4.5.0
Using library: libvirt 4.5.0
Using API: QEMU 4.5.0
Running hypervisor: QEMU 2.12.0

OVMF: OVMF-20180508-6.gitee3198e672e2.el7.noarch

SUMMARY

Under KVM Hypervisor
In UEFI LEGACY mode, the VM cannot enter the system normally, and "Guest has not initialized the display (yet)." is displayed in the console.

VM starts normally in UEFI Secure mode

After comparison, we found that:
In UEFI LEGACY mode, the VM uses pc-i440f chip,
In UEFI Secure mode, the Q35 chip is used.

After I switched the VM chip from pc-i440fx-rhel7.6.0 to pc-q35-rhel7.6.0 (manually modify the configuration file), the VM can enter the system normally.

so. UEFI under CentOS7 should run under Q35 chip (UEFI LEGACY AND UEFI SECURE)

STEPS TO REPRODUCE

1.Deploy VM through template, boot type select UEFI.Boot Mode select LEGACY 
2.After the VM runs successfully, open the console

EXPECTED RESULTS

The console displays guest OS information, or UEFI shell.

ACTUAL RESULTS

Guest has not initialized the display (yet).