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

[Adee]

I'm seeing the same Win10 I/O stall problem with qemu 2.12, but with a vm with 
BIOS, not UEFI.
The solution for me is only dowgrading for now.

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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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