(UEFI) Dell XPS 15z L511z modded BIOS - and HOWTO

[kasar]

while reading the FITC pdf I found some usefull stuff

SMLink1 Thermal
Reporting Select

Desktop
false
Mobile
true

false = Intel ME FW will collect temperature from the processor, PCH and DIMMs. It will be available for polling on SMLink1.

Note: ME Thermal Reporting:
Advantage = Does not require PECI capability in EC.
Disadvantage = no real time temperature alert level control, and no dynamic Sandy Bridge CPU Turbo controls.

— SMLink Thermal Reporting Select = false (default)

— PECI from Sandy Bridge processor is connected to PCH

— BIOS sets Thermal Reporting Control (TRC) MMIO register at TBARB+1Ah to enable ME reporting of processor, PCH, and DIMM temperatures (as appropriate)

— ME thermal reporting PCI device should be enabled for proper interaction with EC, SIO, BMC, or equivalent fan control logic




true = PCH temperature ONLY(1 byte of data) will be available for polling out on SMLink1. Processor and DIMMs temperature monitoring will require an external device.

Note: Platform based Thermal Reporting:

Advantage = allows full dynamic Sandy Bridge Turbo control.

Disadvantage = Requires EC/BMC with PECI capability.

— SMLink Thermal Reporting Select = true

— PECI from Sandy Bridge processor is connected direct to EC, SIO, BMC, or equivalent fan control logic

— BIOS sets Thermal Reporting Control (TRC) MMIO register at TBARB+1Ah = 0x0, disabling ME reporting of processor,PCH, and DIMM temperatures

— ME thermal reporting

that option can be found on descriptor/PCH straps/PCH 15

the PDF specify it usually should be enabled for notebooks and that it allows turbo control, but seems disabled on mine, since that seems a descriptor setting I think I can try flashing a custom descriptor now ^^

edit: I saw stuff to enable the ME emergency mode at the descriptor :o