Hi Vera,

Please test the attached patch.

I need with first and last name with email address to add Reported-by
and Tested-by.

Thanks,
Srinivas

On Fri, 2026-10-16 at 17:10 +0000, verazimmerman1987 wrote:
> Hi,
> 
> On a Dell XPS 14 (2026, Panther Lake, Core Ultra X7 358H) two
> platform
> profile handlers are registered, and their choices have no common
> low-power option, so the legacy /sys/firmware/acpi/platform_profile
> interface exposes only "balanced performance". As a result
> power-profiles-daemon cannot select a low-power firmware mode in
> power-saver.
> 
> Handlers:
> 
>   platform-profile-0  name: SoC Power Slider
>                       choices: low-power balanced performance
>   platform-profile-1  name: dell-pc
>                       choices: cool quiet balanced performance
> 
>   /sys/firmware/acpi/platform_profile_choices: balanced performance
> 
> Effect: power-saver in power-profiles-daemon leaves both handlers at
> "balanced". The Dell firmware stays in its "optimized" mode, so
> thermald --adaptive keeps applying the optimized DTT table (PL1
> 19-25 W) instead of the quiet/cool tables (PL1 15-19 W, lower skin
> temperature targets). Setting the handlers individually
> (dell-pc=quiet, SoC slider=low-power) works and thermald picks the
> "quiet" target, but the legacy file then reports "custom" and
> power-profiles-daemon falls back to "balanced", so there is no
> consistent way to use it.
> 
> This looks like the same class of problem as amd-pmf + asus-wmi,
> which was solved by adding "quiet" as a hidden choice in amd-pmf
> (commit 44e94fece517, "platform/x86/amd: pmf: Add 'quiet' to hidden
> choices"). Would a similar hidden "quiet" (and perhaps "cool") choice
> for the Intel SoC Power Slider, mapped to its low-power setting, be
> acceptable? I'm happy to test patches.
> 
> System:
>   Kernel: 7.2.9-arch1-1
>   DMI: Dell Inc. XPS 14 DA14260, BIOS 1.11.0
>   power-profiles-daemon: 0.30-1
>   thermald: 2:2.5.13-1
> 
> Thanks,
> Vera