[Qemu-devel] [Bug 1769189] Re: Issue with qemu 2.12.0 + UEFI

["Mathias Bösl" <1769189@bugs.launchpad.net>]

I have the same issue. When I open the task manager on the virtualized Windows 10 VM I see the HDD time is at 100% but the data transfer rate is actual 0b/s. 
I've tried any combination of the options below and the issue was always reproducible with qemu-2.12.0-1 and never with qemu-2.11.1-2.

Linux kernels:
- 4.14.5-1
- 4.16.7

Windows 10 Verson (for the VM) 
- 1709
- 1803

Boot HDD for VM
- Actual SSD (/dev/sda)
- QCOW2 Image

QEMU 
- qemu-2.11.1-2
- qemu-2.12.0-1


I also use ARCH Linux and have also downgraded to pre 2.12 QEMU

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https://bugs.launchpad.net/bugs/1769189

Title:
  Issue with qemu 2.12.0 + UEFI

Status in QEMU:
  New

Bug description:
  (first reported here:
  https://bugzilla.tianocore.org/show_bug.cgi?id=949 )

  I had a Windows 10 VM running perfectly fine with OVMF UEFI, since I
  upgraded to qemu 2.12, the guests hangs for a couple of minutes, works
  for a few seconds, and hangs again, etc. By "hang" I mean it doesn't
  freeze, but it looks like it's waiting on IO or something, I can move
  the mouse but everything needing disk access is unresponsive.

  What doesn't work: qemu 2.12 with OVMF
  What works: using BIOS or downgrading qemu to 2.11.1.

  Platform is arch linux 4.16.7 on skylake, I have attached the vm xml
  file.

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