https://bugzilla.kernel.org/show_bug.cgi?id=81231
Bug ID: 81231
Summary: Linux kernel does not support XPSS/XPCC/XPCT
Product: ACPI
Version: 2.5
Kernel Version: 3.15.0
Hardware: i386
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Config-Processors
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Created attachment 144301
--> https://bugzilla.kernel.org/attachment.cgi?id=144301&action=edit
DSDT of the IBM R31
The linux acpi subsystem does currently not support the XPSS specification for
extended frequency scaling of processors. Apparently, the IBM R31 Bios makes
use of this entry instead of the traditional _PSS and friends. The extensions
are documented at
ftp://ftp.sas.ewi.utwente.nl/Outgoing/TM_2300_4000_4500/Manuals/Specification/XPSS_spec.doc
The IBM R31 dsdt is attached. This is from the latest Bios.
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