Windows 11 Spice (Three Monitors) "Error 12" in device manager.

[versed.perception]

Just like the title summaries, for windows Guests spice's additional VGA heads are throwing "out of resources" error 12 in device manager.

There is nothing advanced on these VMs (no IOMMU groups and such), the only thing I can think of is the "sub QXL" devices are trying to share the same DMA memory ranges? Spice works fine for display0, its just these additional heads that are failing and preventing a multi monitor setup.

Any ideas?

PVE is 7.4.-1
Linux 5.15.131-2-pve
pve-manager/7.4-17/513c62be

Target VM's config file:

audio0: device=ich9-intel-hda,driver=spice
bios: ovmf
boot: order=sata0;net0;ide2
cores: 4
efidisk0: smb-vms:100/vm-100-disk-1.qcow2,efitype=4m,pre-enrolled-keys=1,size=528K
ide2: smb-datastore:iso/virtio-win-0.1.229.iso,media=cdrom,size=522284K
machine: pc-q35-6.2
memory: 8192
meta: creation-qemu=7.1.0,ctime=1688775016
name: VDI01
net0: e1000=B2:2F:86:B8:0D:61,bridge=vmbr0,firewall=1,tag=311
numa: 0
ostype: win11
sata0: smb-vms:100/vm-100-disk-0.qcow2,size=180G
scsihw: virtio-scsi-single
smbios1: uuid=327cab55-3702-4e62-8305-b5badf2cf9f5
sockets: 1
spice_enhancements: videostreaming=all
tpmstate0: smb-vms:100/vm-100-disk-0.raw,size=4M,version=v2.0
vga: qxl3,memory=128
vmgenid: 89e68733-58f2-4a9f-8172-19420cdc934b

Screenshot from above VM showing QXL 2 and 3 in error 12 state.



Spice Agents are installed from the bundle, Spice Client is using the remote-viewer and calling the *.vv that comes down from proxmox's WebGUI.

We can see that Spice's remote-viewer thinks there are up to three displays available


But display 2+ just goes to a blank screen

 

[FireStormOOO]

I just ran into this myself; it was very sensitive to the memory I allocated to memory/framebuffer for QXL. The default 128MB resulted in 1 working monitor of 3. Wouldn't boot at all with 32MB or 256MB. 64MB did the trick and I had all 3 working. That ideal number may be graphics card and resolution specific.

Edit: see also https://www.spice-space.org/multiple-monitors.html