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

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Date:	Mon, 26 Jan 2009 12:35:32 +0100
From:	Johannes Berg <johannes@...solutions.net>
To:	Jiri Kosina <jkosina@...e.cz>
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, 2009-01-26 at 12:25 +0100, Jiri Kosina wrote:
> 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?

driver -> ../../../../../bus/usb/drivers/usb
3-5:1.0/driver -> ../../../../../../bus/usb/drivers/usbhid

> 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).

Nope.

Is it possible that I was just in an environment where there was lots of
random infrared traffic that the device picked up? Is it possible to
disable it completely?

johannes

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