[Precise][SRU][PATCH 0/1] Fix Turbo Mode on Gen6+ Intel Platforms

leann.ogasawara at canonical.com leann.ogasawara at canonical.com
Thu Mar 7 20:14:54 UTC 2013


From: Leann Ogasawara <leann.ogasawara at canonical.com>

BugLink: http://bugs.launchpad.net/bugs/1146425

== Precise SRU Justification ==
After a period of inactivity it appears the Turbo mode is not kicking in
on Gen6+ Intel Platforms.  The root cause appears to be a bug in i915
driver code which has been fixed upstream as of v3.5-rc1 via the
following commit:

commit 9104183dad6314c55344d65738cd719b909a3e0a
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Thu Apr 26 11:28:42 2012 +0100

    drm/i915: Periodically sanity check power management

Intel has requested we include the above patch in our Precise kernel.
They have also noted they were able to reproduce the issue on affected
hardware and have confirmed the above patch to resolve said issue.
I am requesting this patch be considered this for a Precise SRU on
Intel's behalf.

== Impact ==
This will affect all Gen6+ platforms.




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