On 16.07.2017 12:23, Brian Masney wrote:
On Sun, Jul 16, 2017 at 09:39:19AM +0200, Arek Burdach wrote:
Hi Patrick,
On 15.07.2017 14:27, Patrick Pedersen wrote:
It shall additionally be noted that the i2c-hid 'sleep' bug (present since kernel ver. 4.3)
still affects the driver. This means that the sensor hub will not report any movement, until
the device is suspended and resumed.
Do you have workaround for that? In my case suspending and resuming doesn't
help. Sensor reporting is backing to work in unpredictable way. What I've
tested:
- kernel v4.13-rc1 with your patch applied
- watch -n1 cat /sys/bus/iio/devices/iio\:device*/*_raw <- value not
changing
- suspend
- resume
- watch -n1 cat /sys/bus/iio/devices/iio\:device*/*_raw <- still not
changing
If you have some workaround scenario please add it to bug reported be me:
https://bugzilla.kernel.org/show_bug.cgi?id=195681
I have a Lenovo Yoga 910-13IKB
So do I
and verified that the patch works
correctly for me on an upstream 4.12 kernel. The ALS sensor and
accelerometer function correctly without suspending the laptop with
this patch. The difference may be due the following kernel boot options
that I use:
i915.enable_rc6=0 pci=noaer intel_pstate=disable
I have to disable power management for the CPU/GPU (i915.enable_rc6=0)
since I can only suspend and resume once on this laptop. Suspending a
second time will cause the laptop to hang before the suspend finishes.
The pci=noaer is likely not needed for UEFI firmware revisions 2JCN36WW
and newer. I'm stuck on UEFI firmware revision 2JCN28WW, which is what
came preinstalled on the system. Lenovo's UEFI update tool requires
Windows, which I no longer have.
I need to get on the latest UEFI revision and go through
basic-pm-debugging.txt if the power management issues are still present.
I have installed 2JCN36WW and: pci=noaer intel_pstate=disable flags are
never need - suspending works ok every time.
I investigated that having iio-sensor-proxy installed may cause sensors
stopping to work. Looks like only one option can work in the same time -
either iio-sensor-proxy service or sensor reporting of raw data.
Arek
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