Brightness control non-functional in Hybrid mode — HP OMEN 16-am0015ns (Arrow Lake-P + RTX 5060 Max-Q, WMI GUID absent)

Brightness control non-functional in Hybrid/Optimus mode — HP OMEN Gaming Laptop 16-am0015ns (Intel Arrow Lake-P + RTX 5060 Max-Q)

Summary

On an HP OMEN Gaming Laptop 16-am0015ns with Intel Arrow Lake-P iGPU and NVIDIA RTX 5060 Max-Q dGPU, panel backlight cannot be adjusted from Linux in Hybrid/Optimus mode. Brightness keys, GUI sliders, and direct sysfs writes all have no visible effect on the panel.

This appears to be related to bug #221530 on kernel bugzilla (HP OMEN MAX 16-ah0xxx, Arrow Lake + RTX 5080) and github.com/NVIDIA/open-gpu-kernel-modules/issues/1087.

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System Information

Field | Value -- | -- Laptop Model | HP OMEN Gaming Laptop 16-am0015ns SKU | BP4Q7EA#ABE Board | HP 8D2F, version 75.54 BIOS | AMI F.14, released 04/14/2026 — latest available iGPU | Intel Arrow Lake-P [Arc Pro 130T/140T] 8086:7d51 rev 03 — 0000:00:02.0 dGPU | NVIDIA GeForce RTX 5060 Max-Q / Mobile (GB206M) 10de:2d19 rev a1 — 0000:01:00.0 NVIDIA driver | 595.80 Kernel | 7.0.12-201.fc44.x86_64 Distribution | Fedora 44 KDE Plasma Session type | Wayland Display panel | BOE, Product code 0x0CF1, manufactured 2024 week 13

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Questions for NVIDIA

1. Is there an alternative WMI GUID or EC path for brightness control on HP OMEN 16-am0015ns (board HP 8D2F) that nvidia_wmi_ec_backlight should support?
2. Should the NVIDIA proprietary driver handle brightness via the _BCM method under PEGB/PEGE/DEDP in the DSDT, given that this method writes to the Intel IGD OpRegion?
3. Can a DMI quirk be added for this hardware to route brightness control correctly?

I am happy to test patches and provide additional logs (full dmesg, acpidump output, disassembled DSDT) on request.

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Related Issues

• Kernel bugzilla #221530: https://bugzilla.kernel.org/show_bug.cgi?id=221530 (HP OMEN MAX 16-ah0xxx, same symptom, Arrow Lake + RTX 5080)
• NVIDIA open-gpu-kernel-modules #1087: https://github.com/NVIDIA/open-gpu-kernel-modules/issues/1087

The issue names no repository files or tests. Start by reviewing the nvidia_wmi_ec_backlight path and the referenced _BCM method under PEGB/PEGE/DEDP, using the requested acpidump and disassembled DSDT if provided. Done would require a confirmed brightness-control route or hardware-specific quirk, followed by validation on the listed HP OMEN system.