Windows VM weird start error

[OppositeStrength]

Hey guys, 

 

I'm trying to get a single GPU dual boot Windows VM going using the spaceinvaderone Tutorials. With some trial and error I got pretty far, but when I start it now the screen goes on, but stays black with two thin white lines towards the left of the screen flashing. 

These are the errors in the VM log:

 

2021-08-18T17:01:36.830150Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165488, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830157Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165470, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830163Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165468, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830170Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165440, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830177Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165428, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830186Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165420, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830195Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165408, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830204Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1653e8, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830213Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1653d8, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830220Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1653d0, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830227Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1653c0, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830234Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1653b0, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830240Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1653a8, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830247Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165398, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830254Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165390, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830261Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165388, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830268Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165380, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830275Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165370, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830281Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165368, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830288Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165360, 0xffffff00000000,8) failed: Device or resource busy
2021-08-18T17:01:36.830295Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165350, 0xffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830302Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165348, 0xffffff00000000,8) failed: Device or resource busy
2021-08-18T17:01:36.830309Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165338, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830315Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165330, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830322Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165328, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830329Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165320, 0xffffff00000000,8) failed: Device or resource busy
2021-08-18T17:01:36.830336Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165318, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830343Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165310, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830352Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165308, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830360Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165300, 0xffffff00000000,8) failed: Device or resource busy
2021-08-18T17:01:36.830368Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652f0, 0xffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830375Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652e8, 0xffffff00000000,8) failed: Device or resource busy
2021-08-18T17:01:36.830381Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652e0, 0x0,8) failed: Device or resource busy
2021-08-18T17:01:36.830388Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652d0, 0xffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830395Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652c8, 0xffffff00000000,8) failed: Device or resource busy
2021-08-18T17:01:36.830402Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652b8, 0xffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830409Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652b0, 0xffffff00000000,8) failed: Device or resource busy
2021-08-18T17:01:36.830416Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x1652a0, 0xffffff00ffffff,8) failed: Device or resource busy
2021-08-18T17:01:36.830423Z qemu-system-x86_64: vfio_region_write(0000:0c:00.0:region1+0x165288, 0x0,8) failed: Device or resource busy

 

I only found threads with this issue either unresolved or with different solutions... please excuse me if I missed something.

thanks in advance