Re: [Qemu-devel] [PATCH] Handle suspend in qemu.

[Kevin O'Connor <kevin@koconnor.net>]

On Thu, Dec 11, 2008 at 04:53:32PM +0200, Gleb Natapov wrote:
> BIOS changes are already upstream.
> 
> Reset a PC and tell BIOS that resume from ram is required on the next
> boot.

Hi Gleb,

How can I test this?

I grabbed the latest bochs from CVS and compiled the BIOS.  I then
tried it on qemu with Fedora8, Ubuntu-8.04, and winxp images - they
all seem to say they can suspend, but none actually work when told to.

The linux images both appear to support standby (cat /sys/power/state
shows "mem"), but trying suspend (echo -n mem > /sys/power/state)
returns "Resource temporarily unavailable" and a series of messages in
/var/log/messages starting with: Freezing of tasks failed after 20.00
second (1 tasks refusing to freeze)

The winxp image shows "suspend" in the shutdown menu.  However, when I
click on it I get a dialog that says:

The device driver for the "Default Monitor" device is preventing the
machine from entering standby.  Please close all applications and try
again.  If the problem persists, you may need to update this driver.

Any ideas?

Thanks,
-Kevin