[Bug 220670] New: Accelerometer missing on cold boot (Lenovo Yoga 7 16AKP10, Ryzen AI 7 350)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220670

            Bug ID: 220670
           Summary: Accelerometer missing on cold boot (Lenovo Yoga 7
                    16AKP10, Ryzen AI 7 350)
           Product: Drivers
           Version: 2.5
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Platform_x86
          Assignee: drivers_platform_x86@kernel-bugs.osdl.org
          Reporter: novatitas366@gmail.com
        Regression: No

Created attachment 308813
  --> https://bugzilla.kernel.org/attachment.cgi?id=308813&action=edit
dmesg output after cold boot

Laptop: Lenovo Yoga 7 2-in-1 16AKP10
CPU: AMD Ryzen AI 7 350
BIOS version: QXCN19WW
OS: CachyOS but issue persists in other linux distros like fedora
Kernel tested: <6.18.0-rc1-1-cachyos-rc, 6.17.0-rc5-2-cachyos-rc, 6.16.6-3>
Desktop: KDE

The built-in accelerometer is not detected on a cold boot into Linux.
If I boot into Windows 11 once and then shut down (not restart) and boot into
Linux, the accelerometer works normally — it appears under
/sys/bus/iio/devices/iio:device3 and monitor-sensor reports data.
After a full power-off or Linux reboot, it disappears again until I boot
Windows again.

Steps to reproduce:


1.Power off laptop completely.
2.Boot directly into Linux.
3.Run:
   ls /sys/bus/iio/devices
   monitor-sensor

  no accelerometer device, monitor-sensor also shows no accelerometer

4.Boot into Windows 11, let it load fully, then Shut down (not restart).
5.Boot Linux again → accelerometer now present and monitor auto rotation works.
6.Reboot Linux → accelerometer disappears again.


Expected behavior:
the accelerometer should initialize on a cold boot, without needing a prior
Windows session.

Actual behavior:
No IIO devices appear on cold boot; accelerometer is only initialized after
Windows has run once.

Please let me know if you need any additional outputs.

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