Starting kvm and switching to tty turns off display

[JohnBobbo69]

I followed the joeknock90 Single GPU Passthrough tutorial, and SomeOrdinaryGamers video, and tried to set up single gpu pass through but when starting the kvm my screen turns off and says no signal until i manually turn off the computer, and when i went to switch to a tty to try and unload the nvidia drivers and start the vm manually my display still turns off and i cant switch back to tty7 or tty1 or any other i have to manually restart the computer, my boot paramaters are

pci=realloc iommu=pt intel_iommu=on video=efifb:off pcie_acs_override=downstream,multifunction zswap.enabled=1 zswap.compressor=zstd zswap.max_pool_percent=10 zswap.zpool=zsmalloc default_hugepagesz=2M hugepagesz=1G hugepages=3 nowatchdog loglevel=3 consoleblank=0 nvme_load=YES nvidia-drm.modeset=1

the only way i can switch to tty without losing signal is without the options

pci=realloc iommu=pt intel_iommu=on video=efifb:off pcie_acs_override=downstream,multifunction

I need those for virtualization
also this is my xml file

<domain type="kvm">
  <name>win10</name>
  <uuid>ad27d6b9-18db-4735-a57d-3c744e41851c</uuid>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
      <libosinfo:os id="http://microsoft.com/win/10"/>
    </libosinfo:libosinfo>
  </metadata>
  <memory unit="KiB">5120000</memory>
  <currentMemory unit="KiB">4096000</currentMemory>
  <memoryBacking>
    <source type="memfd"/>
    <access mode="shared"/>
  </memoryBacking>
  <vcpu placement="static">6</vcpu>
  <os>
    <type arch="x86_64" machine="pc-q35-6.2">hvm</type>
    <loader readonly="yes" type="rom">/usr/share/edk2-ovmf/x64/OVMF_CODE.fd</loader>
    <nvram>/var/lib/libvirt/qemu/nvram/win10_VARS.fd</nvram>
    <bootmenu enable="no"/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <hyperv mode="custom">
      <relaxed state="on"/>
      <vapic state="on"/>
      <spinlocks state="on" retries="8191"/>
      <vendor_id state="on" value="34678923"/>
    </hyperv>
    <kvm>
      <hidden state="on"/>
    </kvm>
    <vmport state="off"/>
    <ioapic driver="kvm"/>
  </features>
  <cpu mode="host-passthrough" check="none" migratable="on">
    <topology sockets="1" dies="1" cores="6" threads="1"/>
    <feature policy="disable" name="smep"/>
  </cpu>
  <clock offset="localtime">
    <timer name="rtc" tickpolicy="catchup"/>
    <timer name="pit" tickpolicy="delay"/>
    <timer name="hpet" present="no"/>
    <timer name="hypervclock" present="yes"/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <pm>
    <suspend-to-mem enabled="no"/>
    <suspend-to-disk enabled="no"/>
  </pm>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type="file" device="disk">
      <driver name="qemu" type="qcow2" cache="writeback"/>
      <source file="/var/lib/libvirt/images/win10.qcow2"/>
      <target dev="vda" bus="virtio"/>
      <boot order="1"/>
      <address type="pci" domain="0x0000" bus="0x04" slot="0x00" function="0x0"/>
    </disk>
    <controller type="usb" index="0" model="qemu-xhci" ports="15">
      <address type="pci" domain="0x0000" bus="0x02" slot="0x00" function="0x0"/>
    </controller>
    <controller type="pci" index="0" model="pcie-root"/>
    <controller type="pci" index="1" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="1" port="0x10"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x0" multifunction="on"/>
    </controller>
    <controller type="pci" index="2" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="2" port="0x11"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x1"/>
    </controller>
    <controller type="pci" index="3" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="3" port="0x12"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x2"/>
    </controller>
    <controller type="pci" index="4" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="4" port="0x13"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x3"/>
    </controller>
    <controller type="pci" index="5" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="5" port="0x14"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x4"/>
    </controller>
    <controller type="pci" index="6" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="6" port="0x15"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x5"/>
    </controller>
    <controller type="pci" index="7" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="7" port="0x16"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x6"/>
    </controller>
    <controller type="pci" index="8" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="8" port="0x17"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x7"/>
    </controller>
    <controller type="pci" index="9" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="9" port="0x18"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x0" multifunction="on"/>
    </controller>
    <controller type="pci" index="10" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="10" port="0x19"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x1"/>
    </controller>
    <controller type="pci" index="11" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="11" port="0x1a"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x2"/>
    </controller>
    <controller type="pci" index="12" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="12" port="0x1b"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x3"/>
    </controller>
    <controller type="pci" index="13" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="13" port="0x1c"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x4"/>
    </controller>
    <controller type="pci" index="14" model="pcie-root-port">
      <model name="pcie-root-port"/>
      <target chassis="14" port="0x1d"/>
      <address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x5"/>
    </controller>
    <controller type="sata" index="0">
      <address type="pci" domain="0x0000" bus="0x00" slot="0x1f" function="0x2"/>
    </controller>
    <controller type="virtio-serial" index="0">
      <address type="pci" domain="0x0000" bus="0x03" slot="0x00" function="0x0"/>
    </controller>
    <interface type="network">
      <mac address="52:54:00:cc:99:73"/>
      <source network="default"/>
      <model type="e1000e"/>
      <address type="pci" domain="0x0000" bus="0x01" slot="0x00" function="0x0"/>
    </interface>
    <serial type="pty">
      <target type="isa-serial" port="0">
        <model name="isa-serial"/>
      </target>
    </serial>
    <console type="pty">
      <target type="serial" port="0"/>
    </console>
    <input type="mouse" bus="ps2"/>
    <input type="keyboard" bus="ps2"/>
    <audio id="1" type="none"/>
    <hostdev mode="subsystem" type="pci" managed="yes">
      <source>
        <address domain="0x0000" bus="0x01" slot="0x00" function="0x1"/>
      </source>
      <rom file="/usr/share/vgabios/GTX1050-patched.rom"/>
      <address type="pci" domain="0x0000" bus="0x06" slot="0x00" function="0x0"/>
    </hostdev>
    <hostdev mode="subsystem" type="pci" managed="yes">
      <source>
        <address domain="0x0000" bus="0x01" slot="0x00" function="0x0"/>
      </source>
      <rom file="/usr/share/vgabios/GTX1050-patched.rom"/>
      <address type="pci" domain="0x0000" bus="0x07" slot="0x00" function="0x0"/>
    </hostdev>
    <hostdev mode="subsystem" type="usb" managed="yes">
      <source>
        <vendor id="0x258a"/>
        <product id="0x1007"/>
      </source>
      <address type="usb" bus="0" port="1"/>
    </hostdev>
    <hostdev mode="subsystem" type="usb" managed="yes">
      <source>
        <vendor id="0x1532"/>
        <product id="0x022a"/>
      </source>
      <address type="usb" bus="0" port="2"/>
    </hostdev>
    <memballoon model="virtio">
      <address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
    </memballoon>
  </devices>
</domain>

this is my start script

#!/bin/bash
# Helpful for debugging
set -x

# Stop display manager
systemctl stop lightdm.service

# Unbind VTconsoles
echo 0 > /sys/class/vtconsole/vtcon0/bind

# Avoid a Race condition by waiting 2 seconds. This can be calibrated to be shorter or longer if required for your system
sleep 10

# Unbind the GPU from display
virsh nodedev-detach pci_0000_01_00_1
virsh nodedev-detach pci_0000_01_00_0

# Unload nvidia modules 
modprobe -r nvidia_drm
modprobe -r nvidia_modeset
modprobe -r nvidia_uvm
modprobe -r nvidia

# Load VFIO Kernel Module  
modprobe vfio
modprobe vfio-pci
modprobe vfio_iommu_type1

this is my revert script

#!/bin/bash
# Useful for debugging
set -x

# Unload VFIO modules
modprobe -r vfio_iommu_type1
modprobe -r vfio-pci
modprobe -r vfio

# Re-Bind GPU to Nvidia Driver
virsh nodedev-reattach pci_0000_01_00_1
virsh nodedev-reattach pci_0000_01_00_0

# Rebind VT consoles
echo 1 > /sys/class/vtconsole/vtcon0/bind

# Reload nvidia-xconfig
nvidia-xconfig --query-gpu-info > /dev/null 2>&1

# Reload nvidia modules
modprobe nvidia
modprobe nvidia_uvm
modprobe nvidia_modeset
modprobe nvidia_drm

# Start Display Manager
systemctl start lightdm.service

also here are my computers specs

any help would be very much appreciated

[petsam]

@JohnBobbo69

when i went to switch to a tty

There may be a slight chance it’s related to your solution to your other (xy?)problem.

Display keeps turning off

there used to be but i removed xscreensaver and xfce4-screensaver, I seem to have fixed it, and for anyone with the same issue what i did was i edited the lightdm slick config and added ‘-dpms s off s noblank s noexpose’ so it looked like this /etc/lightdm/lightdm.conf.d/10-eos-slick.conf Seat:*] xserver-command=X -dpms s off s noblank s noexpose greeter-session=lightdm-gtk-greeter allow-user-switching=true and then i also edited my xinitrc file /etc/X11/xinit/xinitrc or ~/.xinitrc and i…

Do read this man part and try to figure out if this is the case

s
The s option lets you set the screen saver parameters. This option accepts up to two numerical parameters, a ‘blank/noblank’ flag, an ‘expose/noexpose’ flag, an ‘on/off’ flag, an ‘activate/reset’ flag, or the ‘default’ flag. If no parameters or the ‘default’ flag is used, the system will be set to its default screen saver characteristics. The ‘on/off’ flags simply turn the screen saver functions on or off. The ‘activate’ flag forces activation of screen saver even if the screen saver had been turned off. The ‘reset’ flag forces deactivation of screen saver if it is active. The ‘blank’ flag sets the preference to blank the video (if the hardware can do so) rather than display a background pattern, while ‘noblank’ sets the preference to display a pattern rather than blank the video. The ‘expose’ flag sets the preference to allow window exposures (the server can freely discard window contents), while ‘noexpose’ sets the preference to disable screen saver unless the server can regenerate the screens without causing exposure events. The length and period parameters for the screen saver function determines how long the server must be inactive for screen saving to activate, and the period to change the background pattern to avoid burn in. The arguments are specified in seconds. If only one numerical parameter is given, it will be used for the length.

and this

 --powersave mode
           Valid values for mode are:
           vsync|on
               Puts the monitor into VESA vsync suspend mode.
           hsync
               Puts the monitor into VESA hsync suspend mode.
           powerdown
               Puts the monitor into VESA powerdown mode.
           off
               Turns monitor VESA powersaving features.

[JohnBobbo69]

Its possible, but the display turning off after switching to tty or starting the virtual machine was happening before i posted the first issue, and i had tried a few different things like adding video=efifb:off then i tried pci=realloc and the only thing that ive found that fixes anything is removing these parameters

pci=realloc iommu=pt intel_iommu=on video=efifb:off pcie_acs_override=downstream,multifunction

and then im able to switch to a tty just fine but the problem is i cant do any kvm virtualization without intel_iommu=on and pcie_acs_override=downstream,multifunction