BBLV

This saved me after countless hours of searching for a fix and tinkering... My VM's stopped working out of nowhere and this was the solution to get them back up and running. I would get errors when trying to start my VM's and my log was 100% full (due to the VM errors spamming the syslog). I know this is a fix, but what is the underlying issue that is causing this? Something seems very broken for this to just happen randomly...

Weird! Glad you figured it out.

You update to RC4? I had the issue in RC2, can’t remember if I did troubleshooting in RC3, and RC4 just works for me (I created a brand new Windows 11 install via VM/VNC from scratch on a freshly reformatted NVME drive after updating to RC4 FWIW).

FYI I updated to RC4, created a new Windows 11 VM and it fired up right away with VNC - no error messages (I'm remote right now, but will try assigning my new 3090 GPU as soon as I get home later today). Update: switched over from VNC to the 3090 GPU and the new Windows 11 VM fired up immediately. Loving RC4 so far!

You on RC2 or the recently released RC3? I just updated to RC3 and about to do more troubleshooting today. I’ll you know if I can figure it out.

I'm having this exact same issue. Did you ever find a fix? I deleted my libvirt file and rebooted to see if that would reset something, but still running into this same issue with the exact error message as you.

I swapped my Nvidia 2080 card back in and the mouse polling rate stutter/lag issue disappeared! I just took the AMD 6900XT card back to Microcenter, then bit the bullet and ordered a 3090 card. I'll report back here if the issue is isolated to the AMD card in MY system. Seriously weird issue.....

So I passed through my PCIE USB controller and am still getting the mouse lag/stuttering that scales with the mouse polling rate on my Logitech G502. Not sure what to tweak next, but this is starting to piss me off..

Thankfully I have the same Inatek PCIE USB 3 controller that SpaceInvader used in his pass-through YT video, so that's my next step in troubleshooting (just need to find the extra time in the day!). FWIW I'm currently passing the mouse and keyboard through individually by just checking the boxes in the VM Advanced View... Thanks again for the tip that got me moving in the right direction!

Tried this - no improvement for me, but thank you for the recommendation.

Surprisingly, reducing the mouse's polling (report) rate from 1000Hz to 125Hz made the game's fps actually playable (I'm using a Logitech G502 wireless gaming mouse). It still has a noticeable blip/stutter when I move the mouse to look around in-game, but at least we're narrowing down the issue. The weirdest part to me is that I had no issue with this with my prior VM setup with the Nvidia 2080.... I'm scouring the web trying to find a permanent fix for this to do away with as much latency as possible - stumbled onto something about replacing virtio drivers for PS2/USB devices, but more research and tinkering to do.

Interesting... I haven't yet passed through my USB 3 PCI card, but maybe I should try that along with tweaking the mouse settings to see if that fixes the issue.

I just swapped out my GPU (2080 upgraded to a 6900XT) and I'm getting severe stuttering/lagging in games and microstuttering in Win10 (i.e. slight jumpiness moving windows around, etc). I believe I've properly pinned my 2920X TR2 CPU and adjusted my XML for the GPU/HDMI audio properly, but could use some expert feedback. I've scoured the forum for answers, but nothing has seemed to correct the stuttering. I'm a noob with VM's and XML editing - I'd greatly appreciate if someone could take a quick peek and let me know if they see anything obvious that could be causing a conflict. Here's my full XML: <?xml version='1.0' encoding='UTF-8'?> <domain type='kvm'> <name>Windows 10</name> <uuid>b9a3b51e-52b7-ad1e-2fd5-0aca043e6897</uuid> <metadata> <vmtemplate xmlns="unraid" name="Windows 10" icon="windows.png" os="windows10"/> </metadata> <memory unit='KiB'>20971520</memory> <currentMemory unit='KiB'>20971520</currentMemory> <memoryBacking> <nosharepages/> </memoryBacking> <vcpu placement='static'>12</vcpu> <cputune> <vcpupin vcpu='0' cpuset='6'/> <vcpupin vcpu='1' cpuset='18'/> <vcpupin vcpu='2' cpuset='7'/> <vcpupin vcpu='3' cpuset='19'/> <vcpupin vcpu='4' cpuset='8'/> <vcpupin vcpu='5' cpuset='20'/> <vcpupin vcpu='6' cpuset='9'/> <vcpupin vcpu='7' cpuset='21'/> <vcpupin vcpu='8' cpuset='10'/> <vcpupin vcpu='9' cpuset='22'/> <vcpupin vcpu='10' cpuset='11'/> <vcpupin vcpu='11' cpuset='23'/> <emulatorpin cpuset='0,12'/> </cputune> <os> <type arch='x86_64' machine='pc-q35-5.1'>hvm</type> <loader readonly='yes' type='pflash'>/usr/share/qemu/ovmf-x64/OVMF_CODE-pure-efi.fd</loader> <nvram>/etc/libvirt/qemu/nvram/b9a3b51e-52b7-ad1e-2fd5-0aca043e6897_VARS-pure-efi.fd</nvram> </os> <features> <acpi/> <apic/> </features> <cpu mode='host-passthrough' check='none' migratable='on'> <topology sockets='1' dies='1' cores='6' threads='2'/> <cache mode='passthrough'/> <feature policy='require' name='topoext'/> </cpu> <clock offset='localtime'> <timer name='rtc' tickpolicy='catchup'/> <timer name='pit' tickpolicy='delay'/> <timer name='hpet' present='no'/> </clock> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>restart</on_crash> <devices> <emulator>/usr/local/sbin/qemu</emulator> <disk type='file' device='cdrom'> <driver name='qemu' type='raw'/> <source file='/mnt/user/isos/virtio-win-0.1.215.iso'/> <target dev='hdb' 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='writeback'/> <source dev='/dev/disk/by-id/nvme-Samsung_SSD_970_EVO_1TB_S467NX0KB29066F'/> <target dev='hdc' bus='sata'/> <boot order='1'/> <address type='drive' controller='0' bus='0' target='0' unit='2'/> </disk> <controller type='usb' index='0' model='qemu-xhci' ports='15'> <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/> </controller> <controller type='virtio-serial' index='0'> <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='0xc'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x4'/> </controller> <interface type='bridge'> <mac address='52:54:00:91:2b:1a'/> <source bridge='br0'/> <model type='virtio-net'/> <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='unix'> <target type='virtio' name='org.qemu.guest_agent.0'/> <address type='virtio-serial' controller='0' bus='0' port='1'/> </channel> <input type='tablet' bus='usb'> <address type='usb' bus='0' port='3'/> </input> <input type='mouse' bus='ps2'/> <input type='keyboard' bus='ps2'/> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x44' slot='0x00' function='0x0'/> </source> <rom file='/mnt/user/isos/Sapphire.Nitro.SE.6900XT.rom'/> <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0' multifunction='on'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x44' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x1'/> </hostdev> <hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='0x046d'/> <product id='0xc539'/> </source> <address type='usb' bus='0' port='1'/> </hostdev> <hostdev mode='subsystem' type='usb' managed='no'> <source> <vendor id='0x1b1c'/> <product id='0x1b8f'/> </source> <address type='usb' bus='0' port='2'/> </hostdev> <memballoon model='none'/> </devices> </domain>

I'm getting severe stuttering in games making them unplayable. I believe it may be caused by my XML setup of my GPU/audio bindings. For some reason the GPU and onboard audio are showing up on different buses and I can't figure out how to get them to group into the same slot (and assumably use multifunction on the GPU). Any idea on how to rectify that and hopefully cure my stuttering? Here's a snippet from my XML: <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x44' slot='0x00' function='0x0'/> </source> <rom file='/mnt/user/isos/Sapphire.Nitro.SE.6900XT.rom'/> <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/> </hostdev> <hostdev mode='subsystem' type='pci' managed='yes'> <driver name='vfio'/> <source> <address domain='0x0000' bus='0x44' slot='0x00' function='0x1'/> </source> <address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/> </hostdev>

I pulled the attached vbios via GPU-Z from my new AMD Sapphire Nitro+ SE 16GB RX 6900 XT GPU. Please add to the repository. RX 6900XT - Sapphire Nitro+ SE - 16G.rom