[Qemu-devel] [Bug 1585008] Re: Windows 7 guests hang on bootup when qxl video is used

[Anthony de Beus]

Downgraded to qemu-2.4.0-1 (on Arch), problem doesn't exist there.

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https://bugs.launchpad.net/bugs/1585008

Title:
  Windows 7 guests hang on bootup when qxl video is used

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Confirmed

Bug description:
  I installed libvirt-bin and virt-manager on Ubuntu 16.04.  I created a
  new VM for Windows 7, basically with default settings, which includes
  qxl video..  The Windows boot process hangs with the "Starting
  Windows" animation.  CPU and disk I/O drop to zero, and it continues
  animating.... forever and ever...  It never finishes booting.  But it
  doesn't fully "hang" either: the animation continues to animate.

  As a workaround, I set the video mode to "Cirrus" and then Windows
  boots but it is slow and limited.  And also apparently to be avoided:

  https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-
  harmful/

  I can confirm it's only when qxl is enabled, because if I switch from
  Cirrus back to qxl, it hangs again - and going back to Cirrus again
  "fixes" the problem.

  This issue is also reported elsewhere:

  http://serverfault.com/questions/776406/windows-7-setup-hangs-at-
  starting-windows-using-proxmox-4-2

  https://forum.proxmox.com/threads/win7-setup-hangs-in-proxmox-
  ve-4-2.27388/

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