From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrey Rahmatullin <wrar@wrar.name>
Subject: Re: ehci_hcd related S3 lockup on ASUS laptops, again
Date: Thu, 19 Apr 2012 03:47:06 +0600
Message-ID: <20120418214706.GX11484@belkar.wrar.name>
References: <Pine.LNX.4.44L0.1204181727580.1149-100000@iolanthe.rowland.org>
	<201204182344.16986.rjw@sisk.pl>
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To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: jrnieder@gmail.com, linux-pm@lists.linux-foundation.org, USB list <linux-usb@vger.kernel.org>, Steven Rostedt <rostedt@goodmis.org>
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On Wed, Apr 18, 2012 at 11:44:16PM +0200, Rafael J. Wysocki wrote:
> > > > Yes, there are ways to work around this.  At the moment I'm not sur=
e=20
> > > > what would be best; we can ask Rafael.  One big remaining puzzle: W=
hy=20
> > > > are the EHCI controllers the only devices that cause a crash when l=
eft=20
> > > > in D3 during suspend?  We may never know...
> > >=20
> > > Are they put into D3 by ACPI or using the native PCI PM?
> >=20
> > PCI PM, definitely.  Maybe ACPI gets into the act as well, but I doubt=
=20
> > it.  How would we tell?
>=20
> If ACPI is involved, the dev_printk() in acpi_pci_set_power_state() should
> trigger.
And it apparently doesn't?

--=20
WBR, wRAR

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