IRQ/51-SYNA2393 using lots of CPU after suspend/resume

[Shaun Crampton]

After a suspend/resume cycle (using "deep" suspend mode), the process IRQ/51-SYNA2393 uses considerable CPU 10+%. Using the trackpad for a few seconds seems to fix the issue.

I don't normally use the trackpad while docked so it's a bit annoying to have to remember to use it just to get this problem to go away.

Looks like others have hit the same issue; I found this on askubuntu: https://askubuntu.com/questions/1138642/ubuntu-18-04-drains-battery-very-fast-after-wake-up-from-a-deep-sleep

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-generic 5.4.0.33.38
ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
Uname: Linux 5.4.0-33-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: shaun 2997 F.... pulseaudio
 /dev/snd/controlC0: shaun 2997 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Jun 8 11:30:07 2020
InstallationDate: Installed on 2018-12-11 (544 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
MachineType: Dell Inc. Precision 5530
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-33-generic root=/dev/mapper/ubuntu--vg-root ro mem_sleep_default=deep resume=/dev/disk/by-uuid/01f98d09-5f44-4469-904b-c976fbd46d96 quiet splash
RelatedPackageVersions:
 linux-restricted-modules-5.4.0-33-generic N/A
 linux-backports-modules-5.4.0-33-generic N/A
 linux-firmware 1.187
SourcePackage: linux
UpgradeStatus: Upgraded to focal on 2020-05-02 (36 days ago)
dmi.bios.date: 12/25/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.15.0
dmi.board.name: 0FP2W2
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.15.0:bd12/25/2019:svnDellInc.:pnPrecision5530:pvr:rvnDellInc.:rn0FP2W2:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Precision
dmi.product.name: Precision 5530
dmi.product.sku: 087D
dmi.sys.vendor: Dell Inc.

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

This change was made by a bot.

[iMac (imac-netstatz)]

In my case, I am running Ubuntu 22.04 uptodate.

This trackpad bug has been around a while, and due to the slight process naming differences between platforms, it can be hard to link them together.

For myself, this happens on my XPS 13 9385, after coming out of sleep, with a similarly named process irq/51-DELL08AF

It has been reported on other, much older platforms, such as https://bugzilla.redhat.com/show_bug.cgi?id=1656416

Notably it lives the life of the OS version and gets closed every time. Seems like a kernel bug that is persistent over different distributions and versions going back to at least 2018.

Thanks to this post, where I figured out the workaround https://www.dell.com/community/Precision-Mobile-Workstations/High-load-heating-up-fan-noise-after-S3-suspend-and-resume-on/td-p/7441933

In some instances, the workaround was not discovered https://gitlab.freedesktop.org/libinput/libinput/-/issues/263

My hardware is 06cb:76af, but seems like the issue is likely with the driver/kernel/sleep interaction than any specific hardware model from my quick googling.

# dmesg | grep -i touchpad
[ 1.381426] input: DELL08AF:00 06CB:76AF Touchpad as /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-1/i2c-DELL08AF:00/0018:06CB:76AF.0002/input/input11
[ 8.205524] input: DELL08AF:00 06CB:76AF Touchpad as /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-1/i2c-DELL08AF:00/0018:06CB:76AF.0002/input/input37