I have encountered this problem The reason is that I missed the "rom file" in vm config. So it works fine when i add the rom. This is my configuration (I use) <qemu:arg value='-device'/> <qemu:arg value='vfio-pci,host=0000:01:00.0,romfile=/root/rom,multifunction=on,x-vga=on'/>
Rom can be obtained from your host: (0000:01:00.0 is your gpu id) echo 0000:01:00.0 > /sys/bus/pci/devices/0000\:01\:00.0/driver/unbind echo 1 > /sys/bus/pci/devices/0000\:01\:00.0/rom cat /sys/bus/pci/devices/0000\:01\:00.0/rom > /root/rom If your machine screen is still blank. Please tell me and give me your configuration At 2018-07-04 00:00:29, qemu-discuss-requ...@nongnu.org wrote: >Send Qemu-discuss mailing list submissions to > qemu-discuss@nongnu.org > >To subscribe or unsubscribe via the World Wide Web, visit > https://lists.nongnu.org/mailman/listinfo/qemu-discuss >or, via email, send a message with subject or body 'help' to > qemu-discuss-requ...@nongnu.org > >You can reach the person managing the list at > qemu-discuss-ow...@nongnu.org > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Qemu-discuss digest..." > > >Today's Topics: > > 1. KVM blank screen (Francesco Ariis) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Tue, 3 Jul 2018 10:22:59 +0200 >From: Francesco Ariis <fa...@ariis.it> >To: qemu-discuss@nongnu.org >Subject: [Qemu-discuss] KVM blank screen >Message-ID: <20180703082259.zmkw6i43we32b...@x60s.casa> >Content-Type: text/plain; charset=us-ascii > >Hello qemu users, > I have problems using KVM with qemu. > >I invoked qemu like this > > qemu-system-i386 -hda debian.img -cdrom debian-9.4.0-i386-netinst.iso > -boot d -m 1024 > >and it works (albeit slowly). When I try > > qemu-system-i386 -hda debian.img -cdrom debian-9.4.0-i386-netinst.iso > -boot d -m 1024 --enable-kvm > >I only get a blank screen and no error message. lsmod gives: > > $ lsmod | grep kvm > kvm_intel 192512 0 > kvm 454656 1 kvm_intel > irqbypass 16384 1 kvm > >I am not sure what I am doing wrong and/or what is the correct way to >diagnose this. Any help appreciated! >-F > > > >------------------------------ > >Subject: Digest Footer > >_______________________________________________ >Qemu-discuss mailing list >Qemu-discuss@nongnu.org >https://lists.nongnu.org/mailman/listinfo/qemu-discuss > > >------------------------------ > >End of Qemu-discuss Digest, Vol 82, Issue 2 >*******************************************