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Bug #262

open

Sandy Bridge/IvyBridge: Only advertise supported MWAIT states as ACPI C states

Added by Patrick Rudolph over 2 years ago. Updated over 1 year ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
06/18/2020
Due date:
% Done:

0%

Estimated time:
Affected versions:
Needs backport to:
Affected hardware:
Affected OS:

Description

Some CPUs might not support MWAIT(C6)/MWAIT(C7). Don't advertise them as ACPI C3 as not supported.

Actions #1

Updated by Zak Brighton Knight over 1 year ago

Is this possibly related to Issue 121 (https://ticket.coreboot.org/issues/121)? That issue revolves around crashes that occur when an ivy bridge CPU tries to use C states greater than 2.

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