[Bug 1925966] [NEW] Win10 guest freezes randomly

[Ivan Vulovic]

Public bug reported:

In addition to bug #1916775, my Win10 Home guest freezes randomly and
infrequently. Unlike bug ​#1916775, this is unrecoverable and I see on
the host (Debian 4.19.171-2) via iotop that all disk IO has stopped. My
only recourse is a hard reset of the guest.

My setup uses PCI-pass-through graphics (GTX 1650), host cpu (Ryzen 7
3800XT). It seems to occur more frequently when I plug in 3 monitors
rather than 2 into the pass-through graphics card. It occurs whether or
not I use the qcow disk drive.

qemu-system-x86_64
  -cpu 
host,kvm=on,l3-cache=on,hv_relaxed,hv_vapic,hv_time,hv_spinlocks=0x1fff,hv_vendor_id=hv_dummy
  -smp 8
  -rtc clock=host,base=localtime
  -machine type=q35,accel=kvm,kernel_irqchip=on
  -enable-kvm
  -drive if=pflash,format=raw,readonly,file=/usr/share/OVMF/OVMF_CODE.fd
  -drive if=pflash,format=raw,file=/tmp/OVMF_VARS.fd
  -m 32G
  -usb
  -device usb-tablet
  -vga none
  -serial none
  -parallel none
  -boot cd
  -nographic
  -device usb-host,vendorid=0x045e,productid=0x00db
  -device usb-host,vendorid=0x1bcf,productid=0x0005
  -drive 
id=disk0,index=0,format=qcow2,if=virtio,cache=off,file=./win10_boot_priv.qcow2
  -drive 
id=disk2,index=2,aio=native,cache.direct=on,if=virtio,cache=off,format=raw,discard=unmap,detect-zeroes=unmap,file=/dev/vg0/win10_hdpriv
  -device vfio-pci,host=09:00.0,addr=0x02.0x0,multifunction=on
  -device vfio-pci,host=09:00.1,addr=0x02.0x1
  -device vfio-pci,host=09:00.2,addr=0x02.0x2
  -device vfio-pci,host=09:00.3,addr=0x02.0x3
  -netdev tap,id=netid,ifname=taplan,script=no,downscript=no
  -device e1000,netdev=netid,mac=52:54:00:01:02:03

** Affects: qemu
     Importance: Undecided
         Status: New

** Description changed:

- In addition to bug #1916775, my Win10 Home guest freezes randomly and 
infrequently. Unlike bug ​      
- #1916775, this is unrecoverable and I see on the host (Debian 4.19.171-2) via 
iotop that all disk IO has stopped. My only recourse is a hard reset of the 
guest.
+ In addition to bug #1916775, my Win10 Home guest freezes randomly and
+ infrequently. Unlike bug ​#1916775, this is unrecoverable and I see on
+ the host (Debian 4.19.171-2) via iotop that all disk IO has stopped. My
+ only recourse is a hard reset of the guest.
  
  My setup uses PCI-pass-through graphics (GTX 1650), host cpu (Ryzen 7
  3800XT). It seems to occur more frequently when I plug in 3 monitors
  rather than 2 into the pass-through graphics card. It occurs whether or
  not I use the qcow disk drive.
  
- qemu-system-x86_64 
-   -cpu 
host,kvm=on,l3-cache=on,hv_relaxed,hv_vapic,hv_time,hv_spinlocks=0x1fff,hv_vendor_id=hv_dummy
 
-   -smp 8 
-   -rtc clock=host,base=localtime 
-   -machine type=q35,accel=kvm,kernel_irqchip=on 
-   -enable-kvm 
-   -drive if=pflash,format=raw,readonly,file=/usr/share/OVMF/OVMF_CODE.fd 
-   -drive if=pflash,format=raw,file=/tmp/OVMF_VARS.fd 
-   -m 32G 
-   -usb 
-   -device usb-tablet 
-   -vga none 
-   -serial none 
-   -parallel none 
-   -boot cd 
-   -nographic 
-   -device usb-host,vendorid=0x045e,productid=0x00db 
-   -device usb-host,vendorid=0x1bcf,productid=0x0005 
-   -drive 
id=disk0,index=0,format=qcow2,if=virtio,cache=off,file=./win10_boot_priv.qcow2 
-   -drive 
id=disk2,index=2,aio=native,cache.direct=on,if=virtio,cache=off,format=raw,discard=unmap,detect-zeroes=unmap,file=/dev/vg0/win10_hdpriv
 
-   -device vfio-pci,host=09:00.0,addr=0x02.0x0,multifunction=on 
-   -device vfio-pci,host=09:00.1,addr=0x02.0x1 
-   -device vfio-pci,host=09:00.2,addr=0x02.0x2 
-   -device vfio-pci,host=09:00.3,addr=0x02.0x3 
-   -netdev tap,id=netid,ifname=taplan,script=no,downscript=no 
-   -device e1000,netdev=netid,mac=52:54:00:01:02:03
+ qemu-system-x86_64
+   -cpu 
host,kvm=on,l3-cache=on,hv_relaxed,hv_vapic,hv_time,hv_spinlocks=0x1fff,hv_vendor_id=hv_dummy
+   -smp 8
+   -rtc clock=host,base=localtime
+   -machine type=q35,accel=kvm,kernel_irqchip=on
+   -enable-kvm
+   -drive if=pflash,format=raw,readonly,file=/usr/share/OVMF/OVMF_CODE.fd
+   -drive if=pflash,format=raw,file=/tmp/OVMF_VARS.fd
+   -m 32G
+   -usb
+   -device usb-tablet
+   -vga none
+   -serial none
+   -parallel none
+   -boot cd
+   -nographic
+   -device usb-host,vendorid=0x045e,productid=0x00db
+   -device usb-host,vendorid=0x1bcf,productid=0x0005
+   -drive 
id=disk0,index=0,format=qcow2,if=virtio,cache=off,file=./win10_boot_priv.qcow2
+   -drive 
id=disk2,index=2,aio=native,cache.direct=on,if=virtio,cache=off,format=raw,discard=unmap,detect-zeroes=unmap,file=/dev/vg0/win10_hdpriv
+   -device vfio-pci,host=09:00.0,addr=0x02.0x0,multifunction=on
+   -device vfio-pci,host=09:00.1,addr=0x02.0x1
+   -device vfio-pci,host=09:00.2,addr=0x02.0x2
+   -device vfio-pci,host=09:00.3,addr=0x02.0x3
+   -netdev tap,id=netid,ifname=taplan,script=no,downscript=no
+   -device e1000,netdev=netid,mac=52:54:00:01:02:03

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https://bugs.launchpad.net/bugs/1925966

Title:
  Win10 guest freezes randomly

Status in QEMU:
  New

Bug description:
  In addition to bug #1916775, my Win10 Home guest freezes randomly and
  infrequently. Unlike bug ​#1916775, this is unrecoverable and I see on
  the host (Debian 4.19.171-2) via iotop that all disk IO has stopped.
  My only recourse is a hard reset of the guest.

  My setup uses PCI-pass-through graphics (GTX 1650), host cpu (Ryzen 7
  3800XT). It seems to occur more frequently when I plug in 3 monitors
  rather than 2 into the pass-through graphics card. It occurs whether
  or not I use the qcow disk drive.

  qemu-system-x86_64
    -cpu 
host,kvm=on,l3-cache=on,hv_relaxed,hv_vapic,hv_time,hv_spinlocks=0x1fff,hv_vendor_id=hv_dummy
    -smp 8
    -rtc clock=host,base=localtime
    -machine type=q35,accel=kvm,kernel_irqchip=on
    -enable-kvm
    -drive if=pflash,format=raw,readonly,file=/usr/share/OVMF/OVMF_CODE.fd
    -drive if=pflash,format=raw,file=/tmp/OVMF_VARS.fd
    -m 32G
    -usb
    -device usb-tablet
    -vga none
    -serial none
    -parallel none
    -boot cd
    -nographic
    -device usb-host,vendorid=0x045e,productid=0x00db
    -device usb-host,vendorid=0x1bcf,productid=0x0005
    -drive 
id=disk0,index=0,format=qcow2,if=virtio,cache=off,file=./win10_boot_priv.qcow2
    -drive 
id=disk2,index=2,aio=native,cache.direct=on,if=virtio,cache=off,format=raw,discard=unmap,detect-zeroes=unmap,file=/dev/vg0/win10_hdpriv
    -device vfio-pci,host=09:00.0,addr=0x02.0x0,multifunction=on
    -device vfio-pci,host=09:00.1,addr=0x02.0x1
    -device vfio-pci,host=09:00.2,addr=0x02.0x2
    -device vfio-pci,host=09:00.3,addr=0x02.0x3
    -netdev tap,id=netid,ifname=taplan,script=no,downscript=no
    -device e1000,netdev=netid,mac=52:54:00:01:02:03

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