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From: bugzilla-daemon@kernel.org
To: platform-driver-x86@vger.kernel.org
Subject: [Bug 221430] nvidia_wmi_ec_backlight: brightness writes silently dropped on HP OMEN 16 (2025)
Date: Tue, 12 May 2026 20:22:49 +0000	[thread overview]
Message-ID: <bug-221430-215701-I8isIQvesr@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-221430-215701@https.bugzilla.kernel.org/>

https://bugzilla.kernel.org/show_bug.cgi?id=221430

--- Comment #9 from floquimaurice@gmail.com ---
Hi Hans,

To answer your question: The BIOS is set to Hybrid Graphics (Optimus). The eDP
panel is driven directly by the Intel GPU.

You are right about the anomalous 192000 max_brightness on intel_backlight. I
have gathered the full dmesg (drm.debug=0xe) and the i915_vbt dump.

I will open a bug report with the Intel DRM team on GitLab and link this thread
there.

Thanks for your help and for pointing me in the right direction!

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  parent reply	other threads:[~2026-05-12 20:22 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-28 21:23 [Bug 221430] New: nvidia_wmi_ec_backlight: brightness writes silently dropped on HP OMEN 16 (2025) bugzilla-daemon
2026-04-28 21:25 ` [Bug 221430] " bugzilla-daemon
2026-04-28 21:25 ` bugzilla-daemon
2026-04-28 21:25 ` bugzilla-daemon
2026-05-05 12:23 ` bugzilla-daemon
2026-05-10 10:16 ` bugzilla-daemon
2026-05-10 15:20 ` bugzilla-daemon
2026-05-11 22:29 ` bugzilla-daemon
2026-05-12  9:47 ` bugzilla-daemon
2026-05-12 20:22 ` bugzilla-daemon [this message]
2026-05-12 20:23 ` bugzilla-daemon
2026-05-12 20:25 ` bugzilla-daemon
2026-05-12 20:25 ` bugzilla-daemon
2026-05-15 10:01 ` bugzilla-daemon

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