Subject: Re: Call for testing: ACPI standby/suspend support
To: Jared D. McNeill <>
From: Steven M. Bellovin <>
List: tech-kern
Date: 03/09/2006 12:44:04
On Thu, 9 Mar 2006 13:37:12 -0400 (AST)
"Jared D. McNeill" <> wrote:
> As someone said in another message, you have broken firmware and will need 
> to patch it.
> > and the system hangs. I can't tell if it's in a low-power mode; the
> > display is still on, but I can't break into DDB. If I press the power
> > button in this state, I get:
> It's not hung, it's sleeping (S1 shouldn't shut off the display or run 
> any powerhooks).
> > ACPI Error (utmutex-0419): Mutex [8] is not acquired, cannot release
> I get this message too. It's non-fatal for me, at least.

But it's a really bad sign that something else is wrong.
> > acpi0: power button pressed, shutting down!
> >
> > and it shuts down.
> How would you typically resume from sleep in Windows? My Dell requires me 
> to press the power button, but I suppose if a duplicate event is being 
> delivered to acpibut(4), this could be possible..
Pressing the Fn key or opening the lid.  It's also how I resume with
APM on NetBSD.