On Wednesday, December 30, 2015 at 10:43:02 AM, Mykola Dvornik wrote:
> Hi Marek,
>
> Thanks for you prompt reply.
>
> The DSDT describes _ALI method:
>
> ...
> Device (ALSD)
> {
> Name (_HID, "ACPI0008" /* Ambient Light Sensor Device */) //
> _HID: Hardware ID
> Method (_STA, 0, NotSerialized) // _STA: Status
> {
> If ((ALSE == 0x02))
> {
> Return (0x0B)
> }
>
> Return (Zero)
> }
>
> Method (_ALI, 0, NotSerialized) // _ALI: Ambient Light
> Illuminance
> {
> Return (((LHIH << 0x08) | LLOW))
> }
> ...
>
> acpidump also shows _ALI method.
>
> But '/sys/bus/acpi/devices/ACPI0008:00' only contains:
>
> hid
> modalias
> path
> power
> status
> subsystem
> uevent
OK, I don't have a machine with the ALS in it here, so I am CCing the list and
a few more interested parties.
> Regards,
>
> Mykola
>
> On Wed, Dec 30, 2015 at 9:52 AM, Marek Vasut <marex@xxxxxxx> wrote:
> > On Wednesday, December 30, 2015 at 09:32:48 AM, Mykola Dvornik wrote:
> >> Hi guys,
> >>
> >> I am writing to you because the acpi-als kernel module is not
> >>
> >> detecting
> >>
> >> ALS on Dell XPS 13 9343.
> >>
> >> The (decompiled) DSDT of the laptop is attached to this email.
> >>
> >> The ACPI0008 is present in the system with 'cat modalias':
> >>
> >> acpi:ACPI0008:
> >>
> >> but exposes no iio-related stuff.
> >>
> >> I am running Fedora 23 with kernel-4.2.8.
> >>
> >> Would you be so kind to look into this issue?
> >
> > Do you have the _ALI value in the ACPI0008 ? That's what's used to
> > read out
> > the illuminance and without it, the ALS driver won't report anything.
> >
> > Best regards,
> > Marek Vasut
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