[panda-users] Replaying "real'' session

[Brendan Dolan-Gavitt]

Hi Igor,

I believe replaymovie currently only works on replays generated when
the system is in graphical mode, rather than at the VGA console. It's
a bit of a hack, that relies on the fact that the replay is still
updating the framebuffer somewhat, but it doesn't take into account
mode changes or, apparently, the text console.

Also, unless you intend to record the entirety of the boot process,
it's generally better to wait until the system has booted and then
start recording from the monitor, to capture just the behavior you're
interested in. You can also use QEMU's snapshot facilities
(savevm/loadvm) to save and restore the state of the system once it's
fully booted, to save time. PANDA also supports starting a recording
from a snapshot using the -record-from option.

-Brendan

On Wed, Mar 11, 2015 at 2:41 PM, Igor R <boost.lists at gmail.com> wrote:
>> Now I'm trying to use this plugin, but for some reason no images get
>> produced (I can't see any on the harddisk).
>> I use panda vm from Oct.2014.
>> I start recording like this:
>>
>> echo "begin_record rec1" | x86_64-softmmu/qemu-system-x86_64 -m 256 -hda
>> ../../qcow/debian_squeeze_i386_standard.qcow2 -monitor stdio
>
>
> OTOH, if I start recording from the monitor command line, the replay
> does produce ~100 images. However, all these images are identical -
> they represent the very first screen.
> I'd appreciate any pointer!
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