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Feature #477

open

Excessive Power Draw with USB-PD

Added by Stan Janssen about 1 year ago. Updated about 1 year ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
Start date:
03/31/2023
Due date:
% Done:

0%

Estimated time:
Affected versions:
Needs backport to:
Affected hardware:
Starbook MK V
Affected OS:

Description

I have a StarBook MK V with Coreboot connected to a Dell S2719DC external monitor that supplies 45 W of power over USB-C. However, the laptop draws more than the available 45W of power and the display shuts down with a warning message: "Excessive Power Draw from connected device".

I understand that this power management feature could be handled in Coreboot. Is this a feature that could be supported in Coreboot in the future? Is there something that I could do to support the development of this feature? Is there a workaround in the meantime?

Thanks!

Actions #1

Updated by Sean Rhodes about 1 year ago

Already advised to set the power profile to Power Saver, as that limits overall draw to 30W.

Currently no way to write MSRs with UPL handling SMM.

Actions #2

Updated by Stan Janssen about 1 year ago

While setting the power profile to Power Saver works to limit the power draw if the battery is already full, it does not seem to work while the battery was only 20% charged.

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