So i have 2x 1030gt gfx card, 1 of them is assigned to my windows VM which works great.

 

Im trying to assign the other to my Linux mint, im picking seabios and the gfx card i want to use and the rom file but it gives me a black screen?

 

this is log when the VM is running 

 

2018-05-20 16:52:18.860+0000: starting up libvirt version: 4.0.0, qemu version: 2.11.1, hostname: mediaserver
LC_ALL=C PATH=/bin:/sbin:/usr/bin:/usr/sbin HOME=/ QEMU_AUDIO_DRV=none /usr/local/sbin/qemu -name 'guest=Linux mint2,debug-threads=on' -S -object 'secret,id=masterKey0,format=raw,file=/var/lib/libvirt/qemu/domain-7-Linux mint2/master-key.aes' -machine pc-q35-2.11,accel=kvm,usb=off,dump-guest-core=off,mem-merge=off -cpu host -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid b1623826-3fe7-8881-8604-1ab77929de3d -display none -no-user-config -nodefaults -chardev 'socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-7-Linux mint2/monitor.sock,server,nowait' -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -global kvm-pit.lost_tick_policy=delay -no-hpet -no-shutdown -boot strict=on -device pcie-root-port,port=0x8,chassis=1,id=pci.1,bus=pcie.0,multifunction=on,addr=0x1 -device pcie-root-port,port=0x9,chassis=2,id=pci.2,bus=pcie.0,addr=0x1.0x1 -device pcie-root-port,port=0xa,chassis=3,id=pci.3,bus=pcie.0,addr=0x1.0x2 -device pci,netdev=hostnet0,id=net0,mac=52:54:00:c8:96:22,bus=pci.1,addr=0x0 -chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -chardev 'socket,id=charchannel0,path=/var/lib/libvirt/qemu/channel/target/domain-7-Linux mint2/org.qemu.guest_agent.0,server,nowait' -device virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0 -device vfio-pci,host=2d:00.0,id=hostdev0,x-vga=on,bus=pci.4,addr=0x0,romfile=/mnt/user/downloads/Gigabyte.GT1030.2048.170417_LowProfile.rom -device usb-host,hostbus=3,hostaddr=2,id=hostdev1,bus=usb.0,port=1 -device usb-host,hostbus=1,hostaddr=11,id=hostdev2,bus=usb.0,port=2 -device virtio-balloon-pci,id=balloon0,bus=pci.5,addr=0x0 -msg timestamp=on
2018-05-20 16:52:18.860+0000: Domain id=7 is tainted: high-privileges
2018-05-20 16:52:18.860+0000: Domain id=7 is tainted: host-cpu
2018-05-20T16:52:18.900794Z qemu-system-x86_64: -chardev pty,id=charserial0: char device redirected to /dev/pts/2 (label charserial0)

Try with ovmf and see if that works. 

I'm having the same problem when using the standard ubuntu template... OVMF based.  black screen at boot.  Tried different boot parameters as per the linux mint website, to no avail. 

 

I have a nvidia 1070 card

Are you using HDMI or Displayport cables from the GPU to the monitor? I setup my Linux Mint VM quite a while ago but I think I had to use Displayport cable to get it working until I updated the video drivers. Might give that a try. Oh, and I used Seabios and Q35 when I setup my VM.

Edited July 5, 20188 yr by GHunter