** Description changed: [ Impact ] - * The amd-pstate driver will change CPU frequency control mechanism - against different power mode setting in the PPD. To support the - mechanism fully it needs to adapt correct thermal management policy in - the BIOS which is determined by the USTT(User Selectable Thermal Table), - and it is reflected by the platform profile. The feature will change the - ThermalManagement setting after reboot when user change the power mode - setting. + * The AMD and Intel pstate driver will change CPU frequency control + mechanism against different power mode setting in the PPD. To support + the mechanism fully it needs to adapt correct thermal management policy + in the BIOS which is determined by the USTT(User Selectable Thermal + Table), and it is reflected by the platform profile. The feature will + change the ThermalManagement setting after reboot when user change the + power mode setting. The mapping relationship power mode and platform profiles: performance <-> performance balanced <-> balanced/balanced_performance/cool power saver <-> low-power/quiet [ Test Plan ] * On AMD Strix Point/Krackan Point platform which has sysfs node /sys/firmware/acpi/platform_profile * Try to modify power mode by $ sudo powerprofilectl set <power-mode> * Check if /sys/firmware/acpi/platform_profile being updated * After reboot, check if BIOS update the ThermalManagement setting by $ fwupdmgr get-bios-setting ThermalManagement [ Where problems could occur ] * The platform will list supported platform_profile in /sys/firmware/acpi/platform_profile_choices, the DPP power mode should map to one of it, otherwise, it can't select the correct thermal policy. If the platform set the unexpected string which the mapping is not defined in the PPD. The thermal policy can't be switched successfully. [ Other Info ] * Upstream commit: https://gitlab.freedesktop.org/upower/power- profiles-daemon/-/commit/6b565b0b05a2bc92e3c546a567b394f415937265 * The patch is in 25.04 and 25.10 already.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2115041 Title: Can't recognize custom ACPI platform profile To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/2115041/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
