linux-kernel - Re: since 2.6.29-rc: apple infrared keeps system awake?

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Message-ID: <alpine.LNX.1.10.0901261220150.5377@jikos.suse.cz>
Date:	Mon, 26 Jan 2009 12:25:55 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Johannes Berg <johannes@...solutions.net>
cc:	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg@...hat.com>,
	Samuel Ortiz <sameo@...nedhand.com>
Subject: Re: since 2.6.29-rc: apple infrared keeps system awake?

On Mon, 26 Jan 2009, Johannes Berg wrote:

> > > Ever since 2.6.29-rc, I see this in powertop on my macbook5,1:
> > > Top causes for wakeups:
> > >   24.1% ( 27.8)   USB device usb1 : OHCI Host Controller (Linux 2.6.29-rc2-wl-di
> > >   21.5% ( 24.8)       <interrupt> : ohci_hcd:usb1 
> > >   14.5% ( 16.7)   USB device  1-5 : IR Receiver (Apple Computer, Inc.) 
> > > which is way way more than what it used to be, I never saw the IR 
> > > receiver before. I could bisect, but wondered if somebody had seen this 
> > 
> > What driver is bound to this device? (what is the product ID?).
> None, oddly, it seems. At least listing input devices doesn't seem to
> show it.
> Bus 003 Device 002: ID 05ac:8242 Apple, Inc. 

This should be driven by hid-apple/usbhid. Could you please look into 
/sys/bus/usb/devices for this device and check where does the 'driver' 
symlink point to?

Also, for this device, we force a creation of hiddev node, so it's 
possible (and, in fact, probable), that some lirc process has the node 
open and wakes it up periodically? (I think there is a macmini lirc 
userspace driver, please check whether it has the hiddev node open).

-- 
Jiri Kosina
SUSE Labs
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