我是 KVM/QEMMU 的新手。我使用 Virtual Box 在 Arch 主机系统（具有集成和独立 GPU 的笔记本电脑）上的虚拟机中运行 Windows 10。由于对客户计算机的视频响应能力不满意，我决定将[由于电源管理原因未使用]独立 GPU 分配给虚拟机。为此，我放弃了 Virtual Box，转而使用 Virtual Machine Manager（一个可视化 KVM/QEMMU 管理器）来创建新机器。
在遵循教程后，我成功地分配了卡，没有出现任何问题，我绕过了 Code43 错误，一切都很好，官方最新的驱动程序正在运行。
但最大分辨率为 800x600，当尝试启动 Nvidia 控制面板时，抱怨没有连接显示器。
我想要实现的目标：使用我的虚拟机就像在 VirtualBox 中使用它一样（即窗口化，或在需要时全屏显示），除了使用独立 GPU 来提高性能。这是否可能，或者此配置是否需要外部显示器才能使用直通 GPU（这不是我想要做的，顺便说一句也不可能，因为该卡位于笔记本电脑中，其 HDMI 输出绑定到 Intel集成 GPU）
这是 Nvidia 卡的直通配置的样子：
我注意到虚拟机配置中有一些与视频相关的部分。我不确定它们如何交互，以及如何/是否应将它们配置为使用 GPU：
和：
这是完整的虚拟机配置：
<domain type="kvm">
<name>Win10</name>
<uuid>6ab00ea8-54c1-470e-a37f-83d033b743dc</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">5218304</memory>
<currentMemory unit="KiB">5218304</currentMemory>
<vcpu placement="static" current="6">18</vcpu>
<os>
<type arch="x86_64" machine="pc-q35-4.2">hvm</type>
<loader readonly="yes" type="pflash">/usr/share/ovmf/x64/OVMF_CODE.fd</loader>
<nvram>/var/lib/libvirt/qemu/nvram/Win10_VARS.fd</nvram>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state="off"/>
<vapic state="off"/>
<spinlocks state="off"/>
<vendor_id state="on" value="GoodTimesTM"/>
</hyperv>
<kvm>
<hidden state="on"/>
</kvm>
<vmport state="off"/>
</features>
<cpu mode="host-model" check="partial">
<topology sockets="1" cores="3" threads="6"/>
</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="cdrom">
<driver name="qemu" type="raw"/>
<source file="/home/nuk/Downloads/Win10_1909_English_x64.iso"/>
<target dev="sdb" bus="sata"/>
<readonly/>
<address type="drive" controller="0" bus="0" target="0" unit="1"/>
</disk>
<disk type="block" device="disk">
<driver name="qemu" type="raw" cache="none" io="native"/>
<source dev="/dev/nvme0n1p7"/>
<target dev="sdc" bus="sata"/>
<boot order="1"/>
<address type="drive" controller="0" bus="0" target="0" unit="2"/>
</disk>
<disk type="block" device="disk">
<driver name="qemu" type="raw" cache="none" io="native"/>
<source dev="/dev/nvme0n1p8"/>
<target dev="sdd" bus="sata"/>
<address type="drive" controller="0" bus="0" target="0" unit="3"/>
</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="sata" index="0">
<address type="pci" domain="0x0000" bus="0x00" slot="0x1f" function="0x2"/>
</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="virtio-serial" index="0">
<address type="pci" domain="0x0000" bus="0x03" slot="0x00" function="0x0"/>
</controller>
<interface type="direct">
<mac address="52:54:00:77:e0:b9"/>
<source dev="ens12u1u2" mode="bridge"/>
<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>
<channel type="spicevmc">
<target type="virtio" name="com.redhat.spice.0"/>
<address type="virtio-serial" controller="0" bus="0" port="1"/>
</channel>
<input type="tablet" bus="usb">
<address type="usb" bus="0" port="1"/>
</input>
<input type="mouse" bus="ps2"/>
<input type="keyboard" bus="ps2"/>
<graphics type="spice" autoport="yes">
<listen type="address"/>
<image compression="off"/>
</graphics>
<sound model="ich9">
<address type="pci" domain="0x0000" bus="0x00" slot="0x1b" function="0x0"/>
</sound>
<video>
<model type="qxl" ram="65536" vram="65536" vgamem="16384" heads="1" primary="yes"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x0"/>
</video>
<hostdev mode="subsystem" type="pci" managed="yes">
<source>
<address domain="0x0000" bus="0x03" slot="0x00" function="0x0"/>
</source>
<address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
</hostdev>
<redirdev bus="usb" type="spicevmc">
<address type="usb" bus="0" port="2"/>
</redirdev>
<redirdev bus="usb" type="spicevmc">
<address type="usb" bus="0" port="3"/>
</redirdev>
<memballoon model="virtio">
<address type="pci" domain="0x0000" bus="0x04" slot="0x00" function="0x0"/>
</memballoon>
</devices>
</domain>