since 2.6.29-rc: apple infrared keeps system awake?

since 2.6.29-rc: apple infrared keeps system awake?

[Johannes Berg]

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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
before?

johannes

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

[Jiri Kosina]

On Thu, 22 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 
> before?

What driver is bound to this device? (what is the product ID?).

-- 
Jiri Kosina
SUSE Labs

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

[Johannes Berg]

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On Mon, 2009-01-26 at 11:52 +0100, Jiri Kosina wrote:
> On Thu, 22 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 
> > before?
> 
> 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. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0         8
  idVendor           0x05ac Apple, Inc.
  idProduct          0x8242 
  bcdDevice            0.16
  iManufacturer           1 Apple Computer, Inc.
  iProduct                2 IR Receiver
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          1 Apple Computer, Inc.
    bmAttributes         0xa0
      (Bus Powered)
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              0 
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.11
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      42
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              10
Device Status:     0x0000
  (Bus Powered)


johannes

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

[Jiri Kosina]

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

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

[Johannes Berg]

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

[Jiri Kosina]

On Mon, 26 Jan 2009, Johannes Berg wrote:

> 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?

Well, you can always unbind the driver from the device, I guess that 
should shut it up.

But I'd like to understand why this started happening all of a sudden. Are 
you able to reproduce this easily?

-- 
Jiri Kosina
SUSE Labs

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

[Johannes Berg]

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On Tue, 2009-01-27 at 14:18 +0100, Jiri Kosina wrote:
> On Mon, 26 Jan 2009, Johannes Berg wrote:
> 
> > 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?
> 
> Well, you can always unbind the driver from the device, I guess that 
> should shut it up.

Ok, I'll have to write a script for that or something ;)

> But I'd like to understand why this started happening all of a sudden. Are 
> you able to reproduce this easily?

I've watched this issue some more over the last couple of days, and it
seems that it's not (at least not only) related to the kernel version,
2.6.29-rc2 is behaving just fine right now for me. I'm almost ready to
blame it only on the environment, though I don't know why a few places
at university would have so much infrared signal that the device felt a
need to react to them all the time.

I'll try to see whether it happens there with an older kernel too, in
which case I'll just blame it on the environment and disable the device
(well, I guess I want that anyway lest someone actually tries to use the
IR when I'm somewhere with my laptop)

johannes

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