Gangdog

I tried on different PCI slots but same situation. I tried to dump BIOS form P400 but GPU-Z says that can't read. But when I tried start VM with two GPU then VM works good with P400 even without using a bios dump file.

root@Tower:~# cat /proc/iomem 00000000-00000fff : Reserved 00001000-0009ffff : System RAM 000a0000-000fffff : Reserved 000a0000-000bffff : PCI Bus 0000:00 000c0000-000dffff : PCI Bus 0000:00 000c0000-000ce5ff : Video ROM 000f0000-000fffff : System ROM 00100000-09c3efff : System RAM 04000000-04a00816 : Kernel code 04c00000-04e4afff : Kernel rodata 05000000-05127f7f : Kernel data 05471000-055fffff : Kernel bss 09c3f000-09ffffff : Reserved 0a000000-0a1fffff : System RAM 0a200000-0a210fff : ACPI Non-volatile Storage 0a211000-ac44ffff : System RAM ac450000-ac450fff : Reserved ac451000-ac48cfff : System RAM ac48d000-ac48dfff : Reserved ac48e000-b519c017 : System RAM b519c018-b51bca57 : System RAM b51bca58-b51bd017 : System RAM b51bd018-b51cc057 : System RAM b51cc058-b7aa5fff : System RAM b7aa6000-b7aa6fff : Reserved b7aa7000-b9a3ffff : System RAM b9a40000-bc48efff : Reserved bc470000-bc473fff : MSFT0101:00 bc474000-bc477fff : MSFT0101:00 bc48f000-bc4cdfff : ACPI Tables bc4ce000-bcbc1fff : ACPI Non-volatile Storage bcbc2000-bddfefff : Reserved bddff000-beffffff : System RAM bf000000-bfffffff : Reserved c0000000-fec02fff : PCI Bus 0000:00 d0000000-e1ffffff : PCI Bus 0000:0b d0000000-dfffffff : 0000:0b:00.0 e0000000-e1ffffff : 0000:0b:00.0 f0000000-f7ffffff : PCI MMCONFIG 0000 [bus 00-7f] f0000000-f7ffffff : Reserved f0000000-f7ffffff : pnp 00:00 fb000000-fc0fffff : PCI Bus 0000:0b fb000000-fbffffff : 0000:0b:00.0 fc080000-fc083fff : 0000:0b:00.1 fc200000-fcafffff : PCI Bus 0000:02 fc200000-fcafffff : PCI Bus 0000:03 fc200000-fc3fffff : PCI Bus 0000:08 fc200000-fc2fffff : 0000:08:00.3 fc200000-fc2fffff : xhci-hcd fc300000-fc3fffff : 0000:08:00.1 fc300000-fc3fffff : xhci-hcd fc400000-fc5fffff : PCI Bus 0000:07 fc400000-fc4fffff : 0000:07:00.0 fc400000-fc4fffff : igc fc500000-fc503fff : 0000:07:00.0 fc500000-fc503fff : igc fc600000-fc6fffff : PCI Bus 0000:0a fc600000-fc6007ff : 0000:0a:00.0 fc600000-fc6007ff : ahci fc700000-fc7fffff : PCI Bus 0000:09 fc700000-fc7007ff : 0000:09:00.0 fc700000-fc7007ff : ahci fc800000-fc8fffff : PCI Bus 0000:06 fc800000-fc803fff : 0000:06:00.0 fc900000-fc9fffff : PCI Bus 0000:05 fc900000-fc907fff : 0000:05:00.0 fc900000-fc907fff : xhci-hcd fca00000-fcafffff : PCI Bus 0000:04 fca00000-fca03fff : 0000:04:00.0 fca00000-fca03fff : nvme fca04000-fca040ff : 0000:04:00.0 fca04000-fca040ff : nvme fcb00000-fcdfffff : PCI Bus 0000:0d fcb00000-fcbfffff : 0000:0d:00.3 fcb00000-fcbfffff : xhci-hcd fcc00000-fccfffff : 0000:0d:00.1 fcc00000-fccfffff : ccp fcd00000-fcd07fff : 0000:0d:00.4 fcd08000-fcd09fff : 0000:0d:00.1 fcd08000-fcd09fff : ccp fce00000-fcefffff : PCI Bus 0000:01 fce00000-fce1ffff : 0000:01:00.0 fce20000-fce2ffff : 0000:01:00.0 fce20000-fce2ffff : nvme fce30000-fce33fff : 0000:01:00.0 fce30000-fce33fff : nvme fce34000-fceb3fff : 0000:01:00.0 fd200000-fd2fffff : Reserved fd200000-fd2fffff : pnp 00:01 fd380000-fd3fffff : amd_iommu fd400000-fd5fffff : Reserved fe000000-fe01ffff : pnp 00:03 fea00000-fea0ffff : Reserved feb80000-fec01fff : Reserved fec00000-fec003ff : IOAPIC 0 fec01000-fec013ff : IOAPIC 1 fec10000-fec10fff : Reserved fec10000-fec10fff : pnp 00:05 fed00000-fed00fff : Reserved fed00000-fed003ff : HPET 0 fed00000-fed003ff : PNP0103:00 fed40000-fed44fff : Reserved fed80000-fed8ffff : Reserved fed81500-fed818ff : AMDI0030:00 fedc0000-fedc0fff : pnp 00:05 fedc2000-fedcffff : Reserved fedd4000-fedd5fff : Reserved fee00000-ffffffff : PCI Bus 0000:00 fee00000-fee00fff : Local APIC fee00000-fee00fff : pnp 00:05 ff000000-ffffffff : Reserved ff000000-ffffffff : pnp 00:05 100000000-103f2fffff : System RAM 103f300000-103fffffff : Reserved

Bind IOMMU group 27 restart Unraid but same situation - black screen. VM can stop only with "force stop". What else i can try? tower-diagnostics-20220111-2142.zip

Diagnostics with started VM and passthrough Quadro P400. tower-diagnostics-20220111-1022.zip

Okay, what information you need to know. I tried efifb:off but that did not work. VM starts normaly but screen is black. There are log form VM. Do you mean add this command after append "video=efifb:off"?

Do you mean add this command after append "video=efifb:off"?

Hello, I can't passthrough my P400 GPU to VM when start VM(Windows 10) then screen remains black. When i put one more card then P400 can passthrough to my VM. I want to use only one GPU (P400) for VM (Windows 10) and Unraid. Are there any suggestions? Thanks!