[Qemu-devel] [Bug 1590796] Re: 2.6.0 Windows 7 install hangs on splash screen, works ok with 2.5.1

[tkr]

*** This bug is a duplicate of bug 1581936 ***
    https://bugs.launchpad.net/bugs/1581936

** This bug has been marked a duplicate of bug 1581936
   Frozen Windows 7 VMs with VGA CVE-2016-3712 fix (2.6.0 and 2.5.1.1)

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https://bugs.launchpad.net/bugs/1590796

Title:
  2.6.0 Windows 7 install hangs on splash screen, works ok with 2.5.1

Status in QEMU:
  New

Bug description:
  Hi maintainers,

  I have tried to install Windows 7 SP1 from the ISO. The install
  process hangs on the windows 4 color logo with qemu 2.6.0, it works
  and installs fine with 2.5.1.

  This is the script I used with 2.5.1 and it works perfectly fine:

  #!/bin/sh
  exec qemu-system-x86_64 \
          -enable-kvm \
          -uuid 0ec801a0-d215-464b-a658-8f43a24cb62e \
          -machine q35 \
          -cpu host \
          -smp cores=2,threads=2 \
          -drive file=disk/ovmfcode.flash,format=raw,readonly,if=pflash \
          -drive file=disk/ovmfvars.flash,format=raw,if=pflash \
          -drive 
file=disk/windows7.img,discard=unmap,detect-zeroes=unmap,cache=unsafe,if=virtio 
\
          -drive file=ISO/windows7.iso,media=cdrom \
          -drive file=ISO/virtiowin.iso,media=cdrom \
          -netdev tap,id=nic-0,ifname=tap0,vhost=on,script=no,downscript=no \
          -net nic,macaddr=52:54:00:01:00:01,netdev=nic-0,model=virtio \
          -m 4G \
          -vga qxl \
          -soundhw ac97 \
          -usbdevice tablet \
          -rtc clock=host,base=utc \
          -name "Windows 7" \
          -monitor telnet:127.0.0.1:2001,server,nowait \
          -daemonize

  The same hangs on the splash screen with 2.6.0

  Even the following simple script behaves the same and hangs at splash
  screen with 2.6.0:

  #!/bin/sh
  exec qemu-system-x86_64 \
          -drive file=disk/windows7.img,if=ide \
          -drive file=ISO/windows7.iso,media=cdrom \
          -name "Windows 7" \
          $@

  The ISO is Windows 7 Ultimate english version, Service Pack 1. 
  I reproduced the same behaviour on Gentoo and Arch, with the Qemu versions 
provided on both distributions.

  Cheers

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