My Windows 10 VM has lately started pausing itself for no apparent reason. Diagnostics attached.

 

From some cursory research, it looks like it may be related to drive space, but I have only one drive in my system (aside from the parity drive) and it shows plenty of free space so I'm not sure how to resolve. Any help appreciated!

remoteunraid-diagnostics-20211013-1051.zip

Check that sleep/hibernation is disable in the VM.

Hibernation is turned off, and I believe sleep is as well - however I can't get the VM to run long enough to check before it pauses.

Disk1 has enough space, but does is the vdisk large enough? You can try and expand it.

I just tried extending the vdisk... I was able to add space but the VM still pauses.

 

If I try to force it to resume, I get 

Execution error

internal error: unable to execute QEMU command 'cont': Resetting the Virtual Machine is required

Sorry, no more ideas.

Quote

2021-10-13T14:32:15.160406Z qemu-system-x86_64: vfio: Cannot reset device 0000:04:00.0, depends on group 21 which is not owned.
2021-10-13T14:32:18.265387Z qemu-system-x86_64: vfio: Cannot reset device 0000:04:00.0, depends on group 21 which is not owned.

 

Quote

Quote

04:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM206 [GeForce GTX 960] [10de:1401] (rev a1)
    Subsystem: eVga.com. Corp. GM206 [GeForce GTX 960] [3842:2968]
    Kernel driver in use: vfio-pci
    Kernel modules: nvidia_drm, nvidia
04:00.1 Audio device [0403]: NVIDIA Corporation GM206 High Definition Audio Controller [10de:0fba] (rev a1)
    Subsystem: eVga.com. Corp. Device [3842:2968]
    Kernel driver in use: vfio-pci

 

But in your xml only 04:00.0 is passed through.

 

It could be related to properly resetting the gpu.

Try to replace in your xml this:

    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </hostdev>

 

With this:

    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0' multifunction='on'/>
    </hostdev>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x04' slot='0x00' function='0x1'/>
      </source>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x1'/>
    </hostdev>

 

Moreover, you have both vnc and gpu passthrough: I'm not sure it can be done, some report that it works, some other that it's not working.

I would delete also this:

    <graphics type='vnc' port='-1' autoport='yes' websocket='-1' listen='0.0.0.0' keymap='en-us'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <video>
      <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>

 

If you want vnc install a vnc server inside the windows os or use remote desktop.

Since you have a br0 network the vm is reachable from the same lan.

I actually got the VM to work without pausing by adding a USB keyboard and mouse and passing them through to the VM.

 

I have no idea why that would work, but the VM did originally have those items. I had removed them when I physically relocated my server but now the VM is working after re-adding them.

 

I typically access the VM via VNC. I usually don't have any issues with it, except occasionally the disappearing mouse cursor.

It seems it was too good to be true... pausing behavior has returned.

 

Based on the syslog, it does seem to be related to an issue with one of the graphics cards:

Oct 15 10:12:11 RemoteUnraid kernel: pcieport 0000:00:07.0: AER: Multiple Uncorrected (Fatal) error received: 0000:00:00.0 Oct 15 10:12:11 RemoteUnraid kernel: vfio-pci 0000:06:00.0: AER: PCIe Bus Error: severity=Uncorrected (Fatal), type=Inaccessible, (Unregistered Agent ID) Oct 15 10:12:12 RemoteUnraid kernel: pcieport 0000:00:07.0: AER: Root Port link has been reset Oct 15 10:12:12 RemoteUnraid kernel: pcieport 0000:00:07.0: AER: device recovery successful

 

I'm going to try reseating all the cards and risers and see if that helps any

It looks like reseating everything did the trick, VM has been running steady ever since!

Extending the vdisk size worked for me