[Bug 1747056] Re: FreeDOS / MS-Dos / Windows 3.11 cannot perform reboot with 'isapc' machine

[Thomas Huth]

The SeaBIOS update mentioned by Daniel has been included here:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=0b8f74488e50f

So I assume this bug is fixed, thus closing this now. If you still can
reproduce it with the latest version of QEMU, then please complain.

** Changed in: qemu
       Status: New => Fix Released

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Title:
  FreeDOS / MS-Dos / Windows 3.11 cannot perform reboot with 'isapc'
  machine

Status in QEMU:
  Fix Released

Bug description:
  I was installing MS-Dos 6.22 + Windows 3.11 in preparation for running
  Microsoft Bob, and noticed that when they try to perform a reboot,
  they just get stuck. The console cursor stays flashing on/off, but the
  DOS prompt no longer responds to input.

  It is fairly easy to reproduce, even FreeDOS is impacted - download
  the FreeDOS bootable CDROM image, then

  $ qemu-img create demo.img 100MB

  $ qemu-system-x86_64 -machine isapc -cdrom ~/Downloads/FD12CD.iso
  -hda demo.img  -monitor stdio

  Wait for the installer to startup, and then in the monitor console run

    sendkey ctrl-alt-delete

  It will fail to reboot

  Testing shows this is a regression from QEMU 2.8.0 onwards, and git
  bisect further narrowed it down to a SEABIOS update

  commit 6e99f5741ff1b408ea76e6caf2bd4f76df4060e9 (HEAD, tag: 
pull-seabios-20161027-2, tag: pull-seabios-20161027-1, refs/bisect/bad)
  Author: Gerd Hoffmann <kraxel@redhat.com>
  Date:   Thu Oct 27 16:42:28 2016 +0200

      seabios: update to 1.10.0 release.

  Note that this seems particular to the "isapc" machine type - with the
  "pc" machine type, reboot still works

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