Messages in this thread | | | Subject | Re: [PATCH] HID: Add quirk for Lenovo Yoga 910 with ITE Chips | From | Arek Burdach <> | Date | Mon, 17 Jul 2017 08:26:37 +0200 |
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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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