Public bug reported:
Ubuntu 26.04.1 on a Lenovo Yoga Slim 7x (14Q8X9, Snapdragon X Elite,
machine type 83ED).
Normal updates on Oct 29 installed kernel 7.0.0-42-generic. After
rebooting, the laptop's own keyboard doesn't work at all. It works in
the GRUB menu (I can pick entries and caps lock toggles the light), but
as soon as Ubuntu starts loading it stops working, and it's dead at the
login screen. A USB keyboard works fine, and so do the touchpad and
touchscreen.
If I boot 7.0.0-38-generic from Advanced options in GRUB, everything
works again, so I've set that as my default for now.
What dmesg shows on 7.0.0-42 for the keyboard (3-003a):
i2c_hid_of 3-003a: supply vdd not found, using dummy regulator
i2c_hid_of 3-003a: supply vddl not found, using dummy regulator
i2c_hid_of 3-003a: can't add hid device: -22
i2c_hid_of 3-003a: probe with driver i2c_hid_of failed with error -22
On one boot it was a bit different:
i2c_hid_of 3-003a: failed to change power setting. (4 times)
i2c_hid_of 3-003a: can't add hid device: -110
i2c_hid_of 3-003a: probe with driver i2c_hid_of failed with error -110
On 7.0.0-38 the keyboard shows up normally:
input: hid-over-i2c 048D:8987 Keyboard as
/devices/platform/soc@0/bc0000.geniqup/b80000.i2c/i2c-3/3-003a/0018:048D:8987.0001/input/input1
Not sure if it matters, but the x1e80100-lenovo-yoga-slim7x.dtb file is
different between the two kernel versions.
Bug 2170592 looks like it might be the same problem on 26.10 with the
7.3 kernel (same keyboard, same laptop).
I filed this from 7.0.0-38 since that's the kernel where the keyboard
works, so the attached logs are from that one. Happy to test a kernel or
collect more info if someone tells me what's needed.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-38-generic 7.0.0-38.38
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic aarch64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: arm64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: steve 4323 F.... pipewire
steve 4857 F.... wireplumber
/dev/snd/controlC1: steve 4857 F.... wireplumber
/dev/snd/seq: steve 4323 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct 30 07:20:57 2026
InstallationDate: Installed on 2026-07-24 (98 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release arm64 (20260423.1)
Lspci-vt:
-[0004:00]---00.0-[01-ff]----00.0 Qualcomm Technologies, Inc WCN785x Wi-Fi
7(802.11be) 320MHz 2x2 [FastConnect 7800]
-[0006:00]---00.0-[01-ff]----00.0 Samsung Electronics Co Ltd NVMe SSD
Controller PM9C1a (DRAM-less)
MachineType: LENOVO 83ED
ProcFB: 0 msmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-38-generic
root=UUID=473ab697-7092-4a7c-92ca-117e3b1002f8 ro clk_ignore_unused
pd_ignore_unused cma=128M efi=noruntime quiet splash console=tty0
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
acpidump:
dmi.bios.date: 12/02/2025
dmi.bios.release: 1.62
dmi.bios.vendor: LENOVO
dmi.bios.version: NHCN62WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76574 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Yoga Slim 7 14Q8X9
dmi.ec.firmware.release: 1.63
dmi.modalias:
dmi:bvnLENOVO:bvrNHCN62WW:bd12/02/2025:br1.62:efr1.63:svnLENOVO:pn83ED:pvrYogaSlim714Q8X9:rvnLENOVO:rnLNVNB161216:rvrSDK0T76574WIN:cvnLENOVO:ct10:cvrYogaSlim714Q8X9:skuLENOVO_MT_83ED_BU_idea_FM_YogaSlim714Q8X9:pfaYogaSlim714Q8X9:
dmi.product.family: Yoga Slim 7 14Q8X9
dmi.product.name: 83ED
dmi.product.sku: LENOVO_MT_83ED_BU_idea_FM_Yoga Slim 7 14Q8X9
dmi.product.version: Yoga Slim 7 14Q8X9
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug arm64 resolute wayland-session
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2172543
Title:
Yoga Slim 7x built-in keyboard stopped working after update to
7.0.0-42 (26.04), works on 7.0.0-38
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2172543/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
