touchpad not working with kernel 6.8

[Anton]

After the standard update procedure and installation of a new version of the kernel, the touchpad on the MacBook Pro 13 - 2014 stopped working. Even the mouse cursor does not appear on the screen.
If you select the old kernel version 6.6 in the bootloader options, then everything works correctly

Ubuntu 24.04

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-headers-6.8.0-11-generic 6.8.0-11.11
ProcVersionSignature: Ubuntu 6.6.0-14.14-generic 6.6.3
Uname: Linux 6.6.0-14-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Mar 3 11:11:43 2024
InstallationDate: Installed on 2023-11-06 (118 days ago)
InstallationMedia: Ubuntu 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230807.2)
MachineType: Apple Inc. MacBookPro11,1
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-6.6.0-14-generic root=UUID=2075733d-58de-4836-9c71-04dd00378200 ro rootflags=subvol=@ quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-6.6.0-14-generic N/A
 linux-backports-modules-6.6.0-14-generic N/A
 linux-firmware 20240202.git36777504-0ubuntu1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/17/2020
dmi.bios.release: 0.1
dmi.bios.vendor: Apple Inc.
dmi.bios.version: 430.0.0.0.0
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-189A3D4F975D5FFC
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro11,1
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-189A3D4F975D5FFC
dmi.modalias: dmi:bvnAppleInc.:bvr430.0.0.0.0:bd12/17/2020:br0.1:svnAppleInc.:pnMacBookPro11,1:pvr1.0:rvnAppleInc.:rnMac-189A3D4F975D5FFC:rvrMacBookPro11,1:cvnAppleInc.:ct10:cvrMac-189A3D4F975D5FFC:skuSystemSKU#:
dmi.product.family: Mac
dmi.product.name: MacBookPro11,1
dmi.product.sku: System SKU#
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Matthijs (tijs)]

Same problem (and solution) for MacBook Pro 2012

[Andrea Righi (arighi)]

I don't have the hardware at the moment. It'd be great if you could do a test with the latest mainline build, so that we can better understand if it's an upstream issue or something specific with the Ubuntu kernel (or maybe a kernel .config issue):

https://kernel.ubuntu.com/mainline/v6.8.1/

Thanks!

[Matthijs (tijs)]

Latest mainline build of kernel 6.8.1 is working. Touchpad on MacbookPro 2012 is working now. Thanks! This kernel is coming to Ubuntu 24.04?

[Andrea Righi (arighi)]

@tijs not exactly that kernel, but a kernel that has all the fixes that are included in 6.8.1. :)

If you are willing to do one more test to confirm that everything is fine in the next candidate kernel for 24.04, you could try with 6.8.0-20.20 from this ppa: https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/bootstrap

[Matthijs (tijs)]

Somehow I can't get 6.8.0-20 after adding the ppa and updating. But in some way I got the 6.8.0-19 kernel now (from proposed?) and that's working fine with the touchpad.

[Andrea Righi (arighi)]

@tijs thanks for testing it! If 6.8.0-19 is working I assume that also the latest kernel in release (6.8.0-22.22) is also working. If that's the case I think we can close this for now.

[Matthijs (tijs)]

@arighi Yes it's working with 6.8.0-22.22. Thanks!