[Linux Kernel 7.0.7] [hp_wmi] EC layout for board 8C9C unsupported

[Linux Kernel 7.0.7] [hp_wmi] EC layout for board 8C9C unsupported

[Bogdan Nicolae]

Hi,

With a recent kernel upgrade (7.0.7-arch1-1 #1 SMP PREEMPT_DYNAMIC
Thu, 14 May 2026 14:26:22 +0000 x86_64 GNU/Linux) I am noticing the
following line in dmesg:
hp_wmi: Unknown EC layout for board 8C9C. Thermal profile readback
will be disabled. Please report this to
platform-driver-x86@vger.kernel.org

As instructed, I am reporting it in hope it will be supported in the
future. Please let me know if you need further information.

Kind regards,
Bogdan Nicolae

Re: [Linux Kernel 7.0.7] [hp_wmi] EC layout for board 8C9C unsupported

[Krishna Chomal]

On Fri, May 15, 2026 at 08:45:41AM -0500, Bogdan Nicolae wrote:
>Hi,
>
>With a recent kernel upgrade (7.0.7-arch1-1 #1 SMP PREEMPT_DYNAMIC
>Thu, 14 May 2026 14:26:22 +0000 x86_64 GNU/Linux) I am noticing the
>following line in dmesg:
>hp_wmi: Unknown EC layout for board 8C9C. Thermal profile readback
>will be disabled. Please report this to
>platform-driver-x86@vger.kernel.org
>
>As instructed, I am reporting it

Hi Bogdan Nicolae,

Thanks for reporting. The hp-wmi driver now uses EC reads to determine
current platform profile during driver init in thermal_profile_setup()
and during power source change events in victus_s_powersource_event() as
introduced in commit eeeb4c9874bb ("platform/x86: hp-wmi: Add EC offsets
to read Victus S thermal profile").

At the time of that patch we did not have information about the EC
layout for your board, hence the warning in dmesg.

>in hope it will be supported in the future.

Just to clarify, is everything (apart from platform profile being
defaulted to "balanced" at boot) like power and fan control working
as intended? Because this is supposed to be a mere "warning", not
necessarily implying that something is broken.

>Please let me know if you need further information.
>

Please share your EC dump via:

# modprobe ec_sys
# xxd /sys/kernel/debug/ec/ec0/io

This should be sufficient to build a patch and remove the warning.

>Kind regards,
>Bogdan Nicolae

Fwd: [Linux Kernel 7.0.7] [hp_wmi] EC layout for board 8C9C unsupported

[Bogdan Nicolae]

Forgot to reply to all. This should make it on the mailing list as well.

---------- Forwarded message ---------
From: Bogdan Nicolae <bogdan.nicolae@gmail.com>
Date: Fri, May 15, 2026 at 3:15 PM
Subject: Re: [Linux Kernel 7.0.7] [hp_wmi] EC layout for board 8C9C unsupported
To: Krishna Chomal <krishna.chomal108@gmail.com>


Krishna,

Well, no, power profiles do not work at all. The system is usable, but
not controllable. I tried both power-profiles-daemon and tuned-ppd,
neither worked.

Here is the EC hex dump of /sys/kernel/debug/ec/ec0/io:
0000000 0000 0000 0100 0040 ffff 00ff 00ff 011b
0000010 0001 203a 00ff ffff ffff ffff ff11 24ff
0000020 0000 0000 0026 0000 ff00 0020 3600 584b
0000030 4e43 4b30 3138 324a 504c 0055 0001 ff00
0000040 ffff 01ff ff00 ffff 4cff 4f49 004e 0000
0000050 0700 ffff 0031 ff00 0002 412d 0000 0000
0000060 8000 0000 0000 0000 0000 0000 0000 0000
0000070 0000 0000 0000 0000 0000 0000 0000 0000
0000080 0000 0000 0000 0000 0000 2d2d 0000 0000
0000090 3333 2d33 4341 342d 5742 304b 3034 3037
00000a0 0000 d600 0041 2400 0000 0800 2a73 1802
00000b0 0025 0024 0000 2022 0000 0000 0301 1111
00000c0 0000 1986 02b4 40da 3c28 1b5f 1986 1964
00000d0 0000 0000 0000 1986 0146 115b 0000 00e0
00000e0 0000 3300 3610 3a10 3710 8710 0603 a600
00000f0 0500 000b 0000 4330 0090 34e3 0658 2d00
0000100

If it helps and/or related, there are a few other issues:
May 15 08:24:29 kernel: ACPI BIOS Error (bug): Attempt to CreateField
of length zero (20251212/dsopcode-133)
May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WQBC due
to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
May 15 08:24:29 kernel: ACPI BIOS Error (bug): Attempt to CreateField
of length zero (20251212/dsopcode-133)
May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WQBE due
to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
May 15 08:24:29 kernel: ACPI BIOS Error (bug): Attempt to CreateField
of length zero (20251212/dsopcode-133)
May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WHCM due
to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WMAA due
to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
May 15 11:23:25 kernel: ACPI BIOS Error (bug): Could not resolve
symbol [\_SB.PCI0.LPCB.BAT1], AE_NOT_FOUND (20251212/psargs-332)
May 15 11:23:25 kernel: ACPI Error: Aborting method \_SB.PEP._DSM due
to previous error (AE_NOT_FOUND) (20251212/psparse-529)

Thanks,
Bogdan


On Fri, May 15, 2026 at 2:46 PM Krishna Chomal
<krishna.chomal108@gmail.com> wrote:
>
> On Fri, May 15, 2026 at 08:45:41AM -0500, Bogdan Nicolae wrote:
> >Hi,
> >
> >With a recent kernel upgrade (7.0.7-arch1-1 #1 SMP PREEMPT_DYNAMIC
> >Thu, 14 May 2026 14:26:22 +0000 x86_64 GNU/Linux) I am noticing the
> >following line in dmesg:
> >hp_wmi: Unknown EC layout for board 8C9C. Thermal profile readback
> >will be disabled. Please report this to
> >platform-driver-x86@vger.kernel.org
> >
> >As instructed, I am reporting it
>
> Hi Bogdan Nicolae,
>
> Thanks for reporting. The hp-wmi driver now uses EC reads to determine
> current platform profile during driver init in thermal_profile_setup()
> and during power source change events in victus_s_powersource_event() as
> introduced in commit eeeb4c9874bb ("platform/x86: hp-wmi: Add EC offsets
> to read Victus S thermal profile").
>
> At the time of that patch we did not have information about the EC
> layout for your board, hence the warning in dmesg.
>
> >in hope it will be supported in the future.
>
> Just to clarify, is everything (apart from platform profile being
> defaulted to "balanced" at boot) like power and fan control working
> as intended? Because this is supposed to be a mere "warning", not
> necessarily implying that something is broken.
>
> >Please let me know if you need further information.
> >
>
> Please share your EC dump via:
>
> # modprobe ec_sys
> # xxd /sys/kernel/debug/ec/ec0/io
>
> This should be sufficient to build a patch and remove the warning.
>
> >Kind regards,
> >Bogdan Nicolae
>

Re: [Linux Kernel 7.0.7] [hp_wmi] EC layout for board 8C9C unsupported

[Krishna Chomal]

[-- Attachment #1: Type: text/plain, Size: 2908 bytes --]

On Fri, May 15, 2026 at 03:21:46PM -0500, Bogdan Nicolae wrote:
>Krishna,
>
>Well, no, power profiles do not work at all. The system is usable, but
>not controllable. I tried both power-profiles-daemon and tuned-ppd,
>neither worked.
>

Oh, this was unexpected. Your board (8C9C) was the first to be added in this
category so I assumed it was working fine all along. What about fan
control via sysfs (/sys/devices/platform/hp-wmi/hwmon/*), does that
work? Your device should support AUTO/MAX/MANUAL - all three modes.

>Here is the EC hex dump of /sys/kernel/debug/ec/ec0/io:
>0000000 0000 0000 0100 0040 ffff 00ff 00ff 011b
>0000010 0001 203a 00ff ffff ffff ffff ff11 24ff
>0000020 0000 0000 0026 0000 ff00 0020 3600 584b
>0000030 4e43 4b30 3138 324a 504c 0055 0001 ff00
>0000040 ffff 01ff ff00 ffff 4cff 4f49 004e 0000
>0000050 0700 ffff 0031 ff00 0002 412d 0000 0000
>0000060 8000 0000 0000 0000 0000 0000 0000 0000
>0000070 0000 0000 0000 0000 0000 0000 0000 0000
>0000080 0000 0000 0000 0000 0000 2d2d 0000 0000
>0000090 3333 2d33 4341 342d 5742 304b 3034 3037
>00000a0 0000 d600 0041 2400 0000 0800 2a73 1802
>00000b0 0025 0024 0000 2022 0000 0000 0301 1111
>00000c0 0000 1986 02b4 40da 3c28 1b5f 1986 1964
>00000d0 0000 0000 0000 1986 0146 115b 0000 00e0
>00000e0 0000 3300 3610 3a10 3710 8710 0603 a600
>00000f0 0500 000b 0000 4330 0090 34e3 0658 2d00
>0000100
>

Understood, thank you. Please try applying the attached patch:
- 0001-platform-x86-hp-wmi-Enable-thermal-profile-readback-.patch

and recompiling the hp-wmi driver (located at drivers/platform/x86/hp/hp-wmi.c)

Expected results:
1. Warning disappears from dmesg
2. Power profile is working
3. Fan control is working

>If it helps and/or related, there are a few other issues:
>May 15 08:24:29 kernel: ACPI BIOS Error (bug): Attempt to CreateField
>of length zero (20251212/dsopcode-133)
>May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WQBC due
>to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
>May 15 08:24:29 kernel: ACPI BIOS Error (bug): Attempt to CreateField
>of length zero (20251212/dsopcode-133)
>May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WQBE due
>to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
>May 15 08:24:29 kernel: ACPI BIOS Error (bug): Attempt to CreateField
>of length zero (20251212/dsopcode-133)
>May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WHCM due
>to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
>May 15 08:24:29 kernel: ACPI Error: Aborting method \_SB.WMID.WMAA due
>to previous error (AE_AML_OPERAND_VALUE) (20251212/psparse-529)
>May 15 11:23:25 kernel: ACPI BIOS Error (bug): Could not resolve
>symbol [\_SB.PCI0.LPCB.BAT1], AE_NOT_FOUND (20251212/psargs-332)
>May 15 11:23:25 kernel: ACPI Error: Aborting method \_SB.PEP._DSM due
>to previous error (AE_NOT_FOUND) (20251212/psparse-529)
>
>Thanks,
>Bogdan

[-- Attachment #2: 0001-platform-x86-hp-wmi-Enable-thermal-profile-readback-.patch --]
[-- Type: text/plain, Size: 1369 bytes --]

From 25396b4c7303b61a067baaf37dab45a5a3603d64 Mon Sep 17 00:00:00 2001
From: Krishna Chomal <krishna.chomal108@gmail.com>
Date: Wed, 20 May 2026 23:31:59 +0530
Subject: [PATCH] platform/x86: hp-wmi: Enable thermal profile readback for
 board 8C9C

Board 8C9C was earlier marked with quirk victus_s_thermal_params as part
of 8ca7515d3c76 ("platform/x86: hp-wmi: fix platform profile values
for Omen 16-wf1xxx"). This resulted in thermal profile readback being
disabled. With the correct hardware information (EC layout), we fix this
by replacing the quirk with omen_v1_thermal_params.

Fixes: 8ca7515d3c76 ("platform/x86: hp-wmi: fix platform profile values for Omen 16-wf1xxx")
Signed-off-by: Krishna Chomal <krishna.chomal108@gmail.com>
---
 drivers/platform/x86/hp/hp-wmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c
index d1cc6e7d176c..323e6c13526b 100644
--- a/drivers/platform/x86/hp/hp-wmi.c
+++ b/drivers/platform/x86/hp/hp-wmi.c
@@ -239,7 +239,7 @@ static const struct dmi_system_id victus_s_thermal_profile_boards[] __initconst
 	},
 	{
 		.matches = { DMI_MATCH(DMI_BOARD_NAME, "8C9C") },
-		.driver_data = (void *)&victus_s_thermal_params,
+		.driver_data = (void *)&omen_v1_thermal_params,
 	},
 	{
 		.matches = { DMI_MATCH(DMI_BOARD_NAME, "8D41") },
-- 
2.54.0