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View Code? Open in Web Editor NEWUEFI Firmware Optimization Recipe for Connected Standby and Low Temperature (Dell Precision 5750 and XPS 17)
License: MIT License
UEFI Firmware Optimization Recipe for Connected Standby and Low Temperature (Dell Precision 5750 and XPS 17)
License: MIT License
On older Dells I have found the exact same issues happen. The main problem seem to be the PCH not getting in SLP-S0.
Given how frequent the problem is, especially on Dells, and for how long it has existed (since at least the 7275), I believe they have misconfigured a few things from the beginning: they must have simply been copy/pasting their broken configuration since then, while remaining oblivious to the root cause of the problem.
Maybe they don't care, but I find such issues very interesting, and I happen to have a few spare Dells (identical model, CPU, Bios, NVMe...) I could use to study the situation better. If you also want to have a look, I would be happy to share a dump of the ACPI tables or even full BIOS images!
You mention "What you see below are UEFI variables for MY Dell Precision 5750, with Intel Core i7-10750h CPU, NVIDIA RTX 3000 GPU, two KIOXIA (Ex-Toshiba) KXG60ZNV1T02 drives, UEFI FW v1.7.2, etc."
Would it be possible to:
I plan to follow your approach on the different Dell line I have on hand, then after getting good power savings, do the equivalent of a git bisect to impute the power drain on each of the variables: for other models, this could help focus the patching on what matters the most. You could then focus on that for your TBD preparation steps :)
BTW on your README, it would be nice if you could share the power draw of a sleep session, first of a night "with" then a night "without" wake timers ("disconnected standby").
You can do that with either of:
powercfg -setdcvalueindex scheme_current sub_none connectivityinstandby 0
powercfg /setdcvalueindex scheme_current sub_none F15576E8-98B7-4186-B944-EAFA664402D9 0
If you then do a powercfg sleepstudy after a normal night when draining the battery in standby mode, the slope is interesting: on a 10th gen I would expect a battery drain between 1%/h to 0.5%/h.
Measurements in mW/h would be more precise but the system battery is generally sized for the CPU/GPU/display combo so a drain %/h is a good enough proxy.
Also, most people will not bother with Intel Power Gadget or VTune, while a sleepstudy is often done in routine.
Is this repo still maintained? As of early 2024, applying the proposed optimizations on a Precision 5750 with BIOS 1.28 results in an unbootable machine, that doesn't power on. :\
It would be useful to also give a way to revert the changes, by providing the default values of all the optimized settings.
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