Description of problem:
Need an error msg when try to change the heads in cirrus and vga video xml snippet
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Now it seems that the attribute heads can be set in the xml of cirrus and vga video.
1. prepare a guest with cirrus or vga video
2. edit the number of screen
# virsh dumpxml vm1
<model type='cirrus' vram='16384' heads='3' primary='yes'/>
3. check the number of screen using virt-viewer
There is only 1 screen.
Generate an error message if the heads can not be changed in cirrus and vga video xml
After evaluating this issue, there are no plans to address it further or fix it in an upcoming release. Therefore, it is being closed. If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.