linux-kernel - Re: 2.6.30: suspend-to-ram, second s2r wakes up immediately

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Date:	Sun, 14 Jun 2009 21:29:07 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Thomas Meyer <thomas@...3r.de>
Cc:	Frans Pop <elendil@...net.nl>, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, stern@...land.harvard.edu,
	Jiri Kosina <jkosina@...e.cz>
Subject: Re: 2.6.30: suspend-to-ram, second s2r wakes up immediately

On Sunday 14 June 2009, Thomas Meyer wrote:
> Am Sonntag, den 14.06.2009, 20:31 +0200 schrieb Frans Pop:
> > Rafael J. Wysocki wrote:
> > 
> > >> 00:02.1 USB Controller: nVidia Corporation MCP55 USB Controller (rev a2) (prog-if 20 [EHCI])
> > >>       Subsystem: Micro-Star International Co., Ltd. Device 7250
> > >>       Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
> > >>       Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> > >>       Latency: 0 (750ns min, 250ns max)
> > >>       Interrupt: pin B routed to IRQ 23
> > >>       Region 0: Memory at fe9fac00 (32-bit, non-prefetchable) [size=256]
> > >>       Capabilities: [44] Debug port: BAR=1 offset=0098
> > >>       Capabilities: [80] Power Management version 2
> > >>               Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
> > >>               Status: D0 PME-Enable- DSel=0 DScale=0 PME+
> > >>       Kernel driver in use: ehci_hcd
> > > 
> > > PME+ means that the USB EHCI controller will signal a PME as soon as it is
> > > enabled, so if PME is enabled on the controller before suspend, it will
> > > wake up the system.
> > > 
> > > Please send a boot log.
> > 
> > Was already included in the initial message...
> > 
> > I wonder if this device could be the cause:
> > [   40.232873] wlan0: register 'rndis_wlan' at usb-0000:00:02.1-6.1,
> >                Wireless RNDIS device, BCM4320b based, 00:16:01:cf:56:29
> > [   40.232907] usbcore: registered new interface driver rndis_wlan
> > [...]
> > [   41.705516] rndis_wlan 1-6.1:1.0: rndis media disconnect
> 
> Good idea. I should have thought of this myself. No, it's not above
> device. I just tested several constellations and it's seems to be my usb
> mouse. when the mouse is unplug suspend to ram works reliably.
> 
> how to fix the mouse's behaviour?

In principle, you should be able to disable wake-up on the USB controllers.

As for the mouse itself, I don't know.  I'm not even sure if it's possible at
all (CCing Jiri).

Best,
Rafael
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