Re: [Qemu-devel] Windows 7 shutdown causes BSOD

[Stefan Hajnoczi]

On Fri, Nov 4, 2011 at 11:25 AM, Stefan Hajnoczi <address@hidden> wrote:
> On Fri, Nov 4, 2011 at 10:48 AM, Stefan Hajnoczi <address@hidden> wrote:
>> Windows 7 32-bit guest blue screens when I shut it down properly with
>> Start | Shut Down.  The blue screen is only displayed for a split
>> second before the guest reboots so I am not able to easily tell what
>> it says.  My guess is that Windows is triple-faulting or soft
>> rebooting - note that I told Windows to shut down, not reboot.
>>
>> This issue happens on qemu.git/master (and Debian kvm 0.14.1+dfsg-3).
>> Here is the QEMU command-line:
>>
>> x86_64-softmmu/qemu-system-x86_64 -L pc-bios -cpu qemu32 -enable-kvm
>> -m 1024 -rtc base=localtime -drive
>> file=win7.img,if=none,id=drive-ide0-0-0,format=raw -device
>> ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1
>>
>> Questions:
>>
>> Is anyone else experiencing this?
>>
>> Is anyone fixing this?
>>
>> If not I will play with it.  Disabling ACPI might reveal the source of
>> the problem.  If that turns up nothing I will try to get the BSOD or
>> WinDbg output.
>
> Thanks to Andreas Faerber and Michael Tokarev I found out the
> automatic reboot can be disabled in Windows.  Here is the BSOD
> information:
>
> IRQL_NOT_LESS_OR_EQUAL
> STOP: 0x0000000A (0x00000000,0x000000FF,0x00000001,0x828B7220)

This decodes to:
"Windows or a kernel-mode driver accessed paged memory at
DISPATCH_LEVEL or above."

Memory referenced: 0x00000000
IRQL: 0xff
Read/write: Write (1)
Address which referenced memory: 0x828B7220

http://msdn.microsoft.com/en-us/library/ff560129%28v=VS.85%29.aspx

Looks like a NULL pointer reference or maybe a deliberate "we should
never get here" failure.

Stefan