[Bug 221908] New: platform/x86: lenovo-wmi-gamezone: EC fallback to Quiet (blue LED) desyncs with SMARTFAN_GET (max-power) on AC unplug on Lenovo LOQ 15IRH8

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221908

            Bug ID: 221908
           Summary: platform/x86: lenovo-wmi-gamezone: EC fallback to
                    Quiet (blue LED) desyncs with SMARTFAN_GET (max-power)
                    on AC unplug on Lenovo LOQ 15IRH8
           Product: Drivers
           Version: 2.5
          Hardware: Intel
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Platform_x86
          Assignee: drivers_platform_x86@kernel-bugs.osdl.org
          Reporter: ginebrine@gmail.com
        Regression: No

Created attachment 310714
  --> https://bugzilla.kernel.org/attachment.cgi?id=310714&action=edit
Dmesg delta, DMI status, and decompiled DSDT

Distribution: CachyOS (Arch-based)
Kernel: 7.2.0-1-cachyos
Hardware: Lenovo LOQ 15IRH8 (Model 82XV)
BIOS: LZCN44WW (EC: 1.44)

Description:
On Lenovo LOQ 15IRH8 running kernel 7.2.0 with lenovo-wmi-gamezone, there is a
state desynchronization between the physical EC thermal mode and the state
reported by sysfs / WMI on AC disconnect.

Steps to reproduce:
1. Boot system connected to AC power.
2. Ensure platform_profile is set to 'max-power' (Chassis power button LED is
PURPLE / Extreme).
3. Disconnect AC adapter (unplug).

Observed Result:
- Physical power button LED immediately turns BLUE (EC hardware-level fallback
to Quiet/Low-Power mode).
- /sys/firmware/acpi/platform_profile continues to return 'max-power'.
- power-profiles-daemon remains in 'performance'.
- lenovo-wmi-events generates no LWMI_EVENT_THERMAL_MODE notify because WMI
SMARTFAN_GET internally still reports the logical selected mode (Extreme)
rather than the effective EC state (Quiet).

Expected Result:
- When AC is unplugged, platform_profile should reflect the real effective
thermal mode (or fallback to balanced/low-power), or a thermal-mode WMI event
should be raised to notify userspace/PPD of the power limit changes.

Attached:
- lenovo_loq_power_bug.tar.gz (Contains loq_platform_profile_bug.txt and
decompiled ACPI dsdt.dsl)

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