[Troubleshooting] Internal Keyboard/Trackpad Dead on Lenovo Yoga 9i 2-in-1 (Gen 10)

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1

Hello everyone,

I’m seeking assistance with a persistent driver initialization failure on a brand-new, dual-boot setup. I’m running Fedora alongside Windows 11. I am confident the issue is a missing kernel patch or a specific ACPI conflict due to the new hardware.

1. System Details

Component Value
Laptop Model Lenovo Yoga 9i 2-in-1 Aura Edition (Gen 10)
Processor Type Intel Core Ultra (Latest Gen)
Operating System Fedora 43 Workstation Edition
Current Kernel 6.17.8-300.fc43.x86_64
Current Status System boots, is fully encrypted (LUKS), but internal keyboard/touchpad are non-functional. The cursor is visible but frozen. Touchscreen and external USB keyboard work perfectly.

2. Diagnosis and Problem Summary

The system detects both input devices but fails to receive interrupts.

  • dmesg confirms the devices are present: AT Translated Set 2 keyboard and SYNA2BA6 (Synaptics I2C Trackpad).
  • The system appears to be stuck due to an ACPI/I2C resource conflict.

3. Comprehensive List of Failed Workarounds

To avoid redundant suggestions, here are the nine separate kernel parameters tested in the /etc/default/grub configuration (with full re-compilation via grub2-mkconfig)—all have failed to activate the devices:

Category Parameters Attempted Status
ACPI Spoofing acpi_osi=Linux, acpi_osi="Windows 2020" Failed
ACPI/GPE Masking acpi_mask_gpe=0x06 Failed
PCI/I2C Resource pci=nocrs, intremap=nosid Failed
Driver Blacklisting module_blacklist=intel_vbtn, initcall_blacklist=elants_i2c_driver_init Failed
Legacy/Probe Fix i8042.nopnp, i8042.reset i8042.nomux... Failed

4. Specific Request

Given that we have exhausted the public knowledge base of kernel parameters, the issue is highly likely a missing DSDT (ACPI) override patch that is required for this specific hardware’s interrupt routing.

I am looking for:

  1. The specific Bugzilla ticket number tracking the keyboard/touchpad fix for this laptop model/processor generation.
  2. Confirmation if a specific i2c-hid or elants patch has been merged into a Rawhide kernel (6.18+).
  3. Any DSDT override (.dsl file) that the community is currently testing.

Thank you in advance for any insight or direction you can provide.

Note: These troubleshooting steps were guided by the Gemini AI assistant (Gemini Thinking 3.0), which was essential for navigating the complex file structures and syntax errors.

2

PARTIAL SOLUTION / WORKAROUND FOUND

I can confirm that the issue is a Cold Boot Initialization failure.

The Workaround:

  1. Boot into Fedora (Keyboard/Trackpad are frozen).
  2. Close the laptop lid (Suspend).
  3. Wait 2-3 seconds.
  4. Open the lid (Resume).
  5. Both Keyboard and Trackpad immediately wake up and function perfectly.

This suggests the drivers (i2c-hid, elants_i2c) are present and correct, but they are failing the initial handshake during a cold boot (Race Condition). Forcing a re-initialization via Suspend/Resume clears the fault.

Current State:

  • Kernel: 6.17.8-300.fc43.x86_64
  • Grub Parameters: Stock / Default (GRUB_CMDLINE_LINUX="rhgb quiet") — I removed all the previous i8042 and acpi attempts, and this workaround works on a clean config.

Hopefully, this helps pinpoint the patch required for a permanent fix!