Failed to set performance to low-power (Silent)

[mhagnumdw]

Galaxy Book3 Ultra

• Product Name: NP960XFH-XA1BR
• Serial Number: (Do I need to inform?)
• Kernel: 6.10.12-200.fc40.x86_64
• OS: Fedora Linux 40 (Workstation Edition) x86_64
• DE: GNOME 46.5
• Driver version commit hash: f1aba1a7a48ec32b0a32d9eba150be998cae1b07

On the command line, error:

echo low-power | sudo tee /sys/firmware/acpi/platform_profile
low-power
tee: /sys/firmware/acpi/platform_profile: Input/output error

In Gnome, Power Mode > Power Saver does not work, error:

out 10 08:20:43 dwnote2 kernel: samsung_galaxybook: failed setting performance_mode with ACPI method CSXI; device did not respond with success code 0xaa
out 10 08:20:43 dwnote2 gnome-shell[2949]: Could not set property ActiveProfile on remote object /net/hadess/PowerProfiles: GDBus.Error:org.gtk.GDBus.UnmappedGError.Quark._g_2dio_2derror_2dquark.Code0: Failed to activate platform driver 'platform_profile': Failed to write to acpi_platform_profile: Error writing '/sys/firmware/acpi/platform_profile': Input/output error

More information:

cat /sys/firmware/acpi/platform_profile_choices
low-power quiet balanced performance

The only mode I can't set on the command line is low-power.

On the command line, when I set quiet, Gnome says it's in Power Saver mode.

sudo dmidecode --type 3
# dmidecode 3.6
Getting SMBIOS data from sysfs.
SMBIOS 3.5.0 present.

Handle 0x0003, DMI type 3, 22 bytes
Chassis Information
	Manufacturer: SAMSUNG ELECTRONICS CO., LTD.
	Type: Notebook
	Lock: Not Present
	Version: N/A
	Serial Number: omitted - do I need to inform?
	Asset Tag: No Asset Tag
	Boot-up State: Safe
	Power Supply State: Safe
	Thermal State: Safe
	Security Status: None
	OEM Information: 0x00000000
	Height: Unspecified
	Number Of Power Cords: 1
	Contained Elements: 0
	SKU Number: Samsung Chassis

lsmod | grep samsung_galaxybook
samsung_galaxybook     61440  0
sparse_keymap          12288  1 samsung_galaxybook
platform_profile       12288  1 samsung_galaxybook
wmi                    32768  3 video,samsung_galaxybook,wmi_bmof

From docs:

PLUS that the ACPI device SCAI is present with ACPI Device IDs

How do I find out the ID?

Tks!