I have some new elements to this puzzle that may be useful:- I've extracted the ACPI DST table. This device, like the X1 Yoga (https://patchwork.kernel.org/patch/9395641/) has the MHKG method. But on this device it's a no-op! (just returns zero)
- I've extracted the same table under Windows, just to make sure this wasn't an OS difference. It's a no-op there too, but the sensor works.
I'm trying to figure out how to watch ACPI events under Windows to see if that gives any clues. However, is this new info helpful to anyone's understanding? Is anyone able to help me with where to investigate next?
Thank you, Steve On 09/20/2017 10:08 AM, Steven Presser wrote:
Hi Thinkpad ACPI folks,I recently bought a Thinkpad Yoga 11e (20GA001FUS). It's a multimode tablet/laptop and thus has a more-complicated than normal lid sensor. Unfortunately, this lid sensor doesn't work under linux - meaning the keyboard and touchpad exposed and active when in tablet mode.I'm a software person, so I'm a little lost trying to figure out which device/sensor/hardware I need to be looking at for this functionality. However, once I know which device/sensor/hardware to use, I'm happy to write and submit a patch to enable it.I was hoping you all could help me locate the right device/sensor/hardware.From what I've gathered so far:- There is a BOSCH 0200 accelerometer that Windows uses to detect orientation. Under Windows, disabling this sensor also disables the lid detection - but this doesn't seem to be the only device involved. Under linux it shows up as /sys/devices/pci0000:00/808622C1:02/i2c-3/i2c-BOSC0200:00, /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/808622C1:02/BOSC0200:00, /sys/bus/acpi/devices/BOSC0200:00 and /sys/bus/12c/devices/i2c-BPSC0200:00- I have /sys/bus/acpi/devices/MSFT9001:00/ (and probably other locations). Under Windows, this is a (software?) lid sensor. This doesn't seem to work, but I have no idea why.I'm sure there is critical information I just don't know enough to give you - for that I apologize and I would be happy to send it along.Any help you can offer is much appreciated. Thank you, Steve
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