Dell XPS 13 2in1 wakes from sleep when moved on 20.04

[Danny van Dyk]

Dell XPS 13 9310 2in1, running Ubuntu OEM kernel (20.04) on 20.04 LTS.

Laptop suspends and wakes up when lid is closed and opened, respectively.
Laptop erroneously wakes up also in following conditions:

 1. lid is closed and laptop is moved/rotated.
 2. lid is open, suspended manually (via power button), and laptop is moved/rotated.

Until I found out about case 2, I assumed that the hall sensor triggered on slight opening
of the lid. However, case 2 shows that this is unlikely a hard ware defect/sensitivity.
I suspect that the accelaration sensor triggers waking up from sleep.

I can confirm that the problem persist after stopping the iio-sensor-prox service via systemctl.
I did not find which kernel module is reponsible for tracking this sensor. Suggestions?
---
ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: dvandyk 1207 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.04
InstallationDate: Installed on 2020-12-26 (65 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
MachineType: Dell Inc. XPS 13 9310 2-in-1
Package: linux (not installed)
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.6.0-1048-oem root=UUID=9104c339-1746-4791-b1ff-0d439dfd75e0 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 5.6.0-1048.52-oem 5.6.19
RelatedPackageVersions:
 linux-restricted-modules-5.6.0-1048-oem N/A
 linux-backports-modules-5.6.0-1048-oem N/A
 linux-firmware 1.187.9
Tags: wayland-session focal
Uname: Linux 5.6.0-1048-oem x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 10/05/2020
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.1.1
dmi.board.name: 0062CR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 31
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.1.1:bd10/05/2020:svnDellInc.:pnXPS1393102-in-1:pvr:rvnDellInc.:rn0062CR:rvrA00:cvnDellInc.:ct31:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 13 9310 2-in-1
dmi.product.sku: 09FF
dmi.sys.vendor: Dell Inc.

[Ubuntu Foundations Team Bug Bot (crichton)]

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[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1917210

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

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[Danny van Dyk (danny-van-dyk-2)]

I found an interesting line in the dmesg output:

intel-hid INTC1051:00: unknown event 0xcd

The 0xcd event indicates a switch from or to tablet mode, confirming my diagnosis that the accelerometer wakes the laptop form suspend. Incidentally, goolging for this very event
showed me the following patch:

https://www.spinics.net/lists/platform-driver-x86/msg25277.html

I would ask the Ubuntu Kernel team to include this as soon as possible in the OEM kernel.

[Danny van Dyk (danny-van-dyk-2)]

This patch has been included in 5.12-rc7. I have tried the Ubuntu mainline kernel build for 5.12-rc7. I can confirm that the changeset mentioned above works.