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

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

[yue li]

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.

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

[Krishna Chomal]

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

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

[Thorsten Leemhuis]

On 5/3/26 09:26, Krishna Chomal wrote:
> On Thu, Apr 30, 2026 at 12:59:58PM +0800, yue li wrote:
>> [...]
>> 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:
> [...]
> 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.

You you then maybe be so kind and submit backports to the 7.0.y stable
series to prevent more people from running into this?

Ciao, Thorsten

> [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