Re: [REGRESSION] hp-wmi fails to probe on HP OMEN (board 8D41)

[Krishna Chomal <krishna.chomal108@gmail.com>]

On Thu, Apr 30, 2026 at 12:59:58PM +0800, yue li wrote:
>Hi,
>
>I am reporting a regression in the hp-wmi driver on an HP OMEN laptop.
>
>System:
>
>Vendor: HP
>Product: OMEN MAX Gaming Laptop 16-ah0089TX
>Board: 8D41
>BIOS: F.12
>Kernel: 7.0.2-zen1-1-zen
>
>Regression:
>The hp-wmi driver works correctly on kernel 6.18.6-zen1-1-zen,
>but fails to probe on 7.0.2-zen1-1-zen with error -22.
>
>Issue:
>On the affected kernel, loading the module fails:
>
>modprobe: ERROR: could not insert 'hp_wmi': No such device
>
>dmesg output:
>
>hp_wmi: Unknown EC layout for board 8D41. Thermal profile readback
>will be disabled.
>hp-wmi hp-wmi: probe with driver hp-wmi failed with error -22
>
>The system exposes the expected WMI GUIDs:
>
>5FB7F034-2C63-45E9-BE91-3D44E2C707E4
>95F24279-4D7B-4334-9387-ACCDC67EF61C
>
>This suggests the driver matches the device, but fails during probe due to
>the unknown EC layout.
>
>Question:
>Is this board expected to be supported? If not, would it be acceptable to
>allow the driver to load in a degraded mode instead of failing probe?
>
>Please let me know if additional logs or testing are required.
>
>Thanks.

Hi Yue Li,

Thanks for reporting. This is a known issue [1]. There are 2 failures in
your dmesg output:
1. Unknown EC layout: The fix for this has been sent recently.
    Currently, it is in the review-ilpo-fixes branch [2].
2. Probe failed: This is due to a failure in parsing the fan table. The
    fix for this has been merged into 7.1-rc1 [3].

Using kernel 7.1 (or applying the above mentioned 2 patch manually to
your current build) should restore full support for your device.

Thanks, and apologies for the inconvenience.

[1] https://lore.kernel.org/platform-driver-x86/4ae4d7f9-f1db-4394-b0d9-c75dc39afcf8@gmail.com
[2] https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/commit/?h=review-ilpo-fixes&id=c2d4b76458c9ebf81eae2916970320f1f61ad002
[3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/platform/x86/hp/hp-wmi.c?h=v7.1-rc1&id=9d317a54e46d3b6420567dc5b63e9d7ff5c064a3