I like to confirm that changing to same bus, but different function works.
Unraid 6.11.5, MacOS Big Sur. AMD 3600X, MSI Radeon RX560.
This is my XML file.
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x0a' slot='0x00' function='0x0'/>
</source>
<alias name='hostdev0'/>
<rom file='/mnt/disk1/isos/vbios/msi.rx.areoitx.oc.rom'/>
<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x0' multifunction='on'/>
</hostdev>
<hostdev mode='subsystem' type='pci' managed='yes'>
<driver name='vfio'/>
<source>
<address domain='0x0000' bus='0x0a' slot='0x00' function='0x1'/>
</source>
<alias name='hostdev1'/>
<address type='pci' domain='0x0000' bus='0x05' slot='0x00' function='0x1'/>
hostdev upper part is the graphic.
vbios is dumped by gpu-z from techpowerup. vbios dump by spaceinvader youtube instruction doesn't work.
I added the line multifunction='on'. It's not added by default.
hostdev lower part is the HDMI sound from the same graphic card.
The bus was a different one, function was function='0x0', same as graphic.
So I changed to make sure bus is the same 0x05, and change the sound function to 0x1.
function='0x0' << graphic function
function='0x1' << sound function
I currently assign 3 cores/6 threads, which works fine. If I want to change to more core. eg. 4 core/8 threads , run the script "1_macinabox_helper" (from spaceinvader instruction and template) from the User Scripts in the Settings.
This is a part in the "1_macinabox_helper" script:
# leave set to "no" when your core count is standard
# set to "yes" if boot hangs on the apple logo due to you assigned a non standard amount of cores to the vm
REMOVETOPOLOGY="yes"
<<Try with both removetopology set to yes and no.
Several issues happen:
1/ the above edits that I made so that graphic and sound functions work now got changed.
graphic part is assigned to bus 0x04,
multifunction='on' is removed
sound part is assigned to bus 0x05.
It's annoyed to go back to XML view to change these back to previously known working, as above. Now there's another issue:
2/ if assigning both graphic and sound to bus 0x04, screen is black.
.assigning both to bus 0x04, screen is still black.
.assigning both to bus 0x05, screen is still black.
.assigning both to bus 0x01 or 0x02 or 0x03, it will conflict with other devices
.to bus 0x00, slot 0x09 (using slot 9 to avoid the conflict with other devices which take up slot 1, 2, 3 ...), it runs, the screen is on, but booting is stuck at Apple logo.
Side note: it happens the same with Debian Linux/Ubuntu, had to change to bus 0x00, 0x01, 0x02, or 0x03 for graphic to be output to the screen.
I'm feeling that any bus above bus 0x03 will not work, just like the VM has only a limit number of buses, up to bus 0x03. I don't know how to change this.
Only bus 0x00 will allow to use many slot other than slot 0x00.
Bus 0x01 and above will only allow to use 1 slot, which is slot 0x00.
Any input would be appreciated.
