[Qemu-devel] [Bug 498035] Re: qemu hangs on shutdown or reboot (XP guest)

[Edwin Drood]

My Two Cents.

I am using Xubuntu 14.04 recent install -- all updates.

I created a WIN7 x64 VM (fresh clean install) with most Windows updates
-- nothing else.

Note:  I use a script (command line startup) of "qemu-system-x86_64"

Inside Windows 7, I shutdown a few services that I thought I did not
need (incl. POWER Service)

I had an occasional BSOD when shutting down.  very quick, minor
annoyance.  Was able to slect start normally in Windows next boot --
only happened once every 10 or so times.

BUT  I was able to shutdown quickly every time.

I discovered that I had to enable the POWER service to activate the
virtual soundcard HW hda (to play audio).

since I have enabled the POWER service, I cannot shutdown normally.  The
"Shutting Down..." appears forever (or until occasional BSOD).

This does not cause any undue processor load and I am able to do a
normal "quit" of the VM using telnet into the monitor.  (issuing "quit"
from the monitor is like yanking out the power-cord of the VM)  I see no
problems from doing this.  Windows thinks it is shut-down clean enough.

It is possible that when I issue the "quit" in the monitor after about
10 seconds of shutdown, I may not get any more BSOD at all.

I have tried playing with the Windows Power configuration settings and
have found nothing to solve the issue.

Other than this minor annoyance, everything is working great!  (because
it is running so well, I probably won't be running a trace or debugging
the dump file in Windows.  If anybody wants, I can share my startup
script that launches the VM.  I am not going to use any virt manager
from the GUI.

-- 
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https://bugs.launchpad.net/bugs/498035

Title:
  qemu hangs on shutdown or reboot (XP guest)

Status in QEMU:
  Incomplete

Bug description:
  When I shut down or reboot my Windows XP guest, about half the time,
  it hangs at the point where it says "Windows is shutting down...".  At
  that point qemu is using 100% of one host CPU, about 85% user, 15%
  system.  (Core 2 Quad 2.66GHz)

  This is the command line I use to start qemu:

  qemu-system-x86_64 -hda winxp.img -k en-us -m 2048 -smp 2 -vnc :3100
  -usbdevice tablet -boot c -enable-kvm &

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