Skip to contentSkip to conversation

Using intel_pstate

DISCUSSION Phillip Susi 2 participants 3 messages Feb 22, 2014 – Feb 23, 2014 ACPI

lore
Share & tools
lore

Phillip Susi

author
#0 lore raw

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

The intel_pstate driver says it should be the preferred driver on sandy bridge systems, but my system is using the acpi p state driver instead. According to the cpufreq Makefile this appears to be intended as it is placed first in the link order. Why is this and how can I make sure the intel_pstate driver is used instead?

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBCgAGBQJTCSlKAAoJEI5FoCIzSKrwkWEIAIn9tsNcr1n/OrOCbHwKLsY6 jgXBfYJDsW7NxH2wFbyjkKdQm2XeJNgSn2JQSxQ9idI92l4+JdfYQdvG/9CTczHI heMBVbCLnFXRsVLzFdLLpRGqXWnBoz3WV+Rvug4RiHxx144cMtDCN/n3A9UWqs7Z BcHrqh07t4p+am6JYkDj/oAOV+DJqHpXjQmmhmA5lxsjsOMQ5k/GGLLkaI6YPE8r wiZIdK8PMNbsgk6g7Mwap1DOG1ucMSD4aIeR1FbxDgwo8p4OVOyoepjMX/SjCOvr bLAuw0k9zyFPSxOR5KijvobmhyxuL/wtGIgnXGzs1LzZAW+cneg5Anp2L1HgiTo= =Pgew
-----END PGP SIGNATURE-----

#1 lore raw
Quoted 5 lines · Phillip Susi

The intel_pstate driver says it should be the preferred driver on sandy bridge systems, but my system is using the acpi p state driver instead. According to the cpufreq Makefile this appears to be intended as it is placed first in the link order. Why is this and how can I make sure the intel_pstate driver is used instead?

Do you have CONFIG_X86_INTEL_PSTATE=y set in your .config?

Signature · 2 lines
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
author
#2 lore raw

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Quoted 9 lines · Rafael J. Wysocki
Quoted 6 lines · Phillip Susi

The intel_pstate driver says it should be the preferred driver on sandy bridge systems, but my system is using the acpi p state driver instead. According to the cpufreq Makefile this appears to be intended as it is placed first in the link order. Why is this and how can I make sure the intel_pstate driver is used instead?

Do you have CONFIG_X86_INTEL_PSTATE=y set in your .config?

Nevermind.. turns out Ubuntu has a patch to disable it by default and you have to explicitly pass intel_pstate=enable to turn it on.

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.14 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBCgAGBQJTCXUCAAoJEI5FoCIzSKrwqzQH/iS4frc3VZ+DjrtM7Os5Nm/w ZbZQgq70pXYdH3LIC3cR8PUefKE/h5sIPt6uM0t+GJVVfCpVItiviGhFd0Qvp6Lv N7yj5r4up1RQJDpWcClLpytg5B4euWTQBBC4ayqGWh3rX32sVu9uRoZznjAstEKd c+I/gH7v3f+cnvABqpOFsk/YE/LfLmyqOS+g7N3Syf9Q43WsnRo/vu9Z1q8f3nwz T238VZXir3ElcofH+DmtZR7pDNeNObl1nfYlPgT3NDlvvygMZ/q3su/noJzcH3JF hKbdCBtMwyxWcVWRSf/e20ZoJIZNksDt1SKLWCI/SFN1+OlFUvpUVYQmhbSxYZQ= =xEbX
-----END PGP SIGNATURE-----