Opened 7 years ago

Closed 6 years ago

Last modified 6 years ago

#9343 closed enhancement (fixed)

intel extreme needs rc6 power downclocking

Reported by: kallisti5 Owned by: axeld
Priority: low Milestone: R1/beta1
Component: Drivers/Graphics/intel_extreme Version: R1/Development
Keywords: downclocking power pm rc6 Cc:
Blocked By: Blocking:
Has a Patch: no Platform: All

Description

Generation 6 (SandyBridge) and higer Intel Extreme chipsets can downclock their GPU's to 0 when unused. This adds a huge improvement in battery life on mobile devices.

Attachments (1)

power.cpp (2.4 KB ) - added by kallisti5 7 years ago.
rev1

Download all attachments as: .zip

Change History (6)

comment:1 by kallisti5, 7 years ago

This can be enabled via an *extremely* long series of register writes in the Xorg i915 driver.

Attaching the work i've done so far.. still imcomplete.

by kallisti5, 7 years ago

Attachment: power.cpp added

rev1

comment:2 by kallisti5, 7 years ago

a more complete version was commited in hrev45114. I'm leaving this open for now as Urias mentioned testing the changes on SandyBridge looking for regressions.

comment:4 by kallisti5, 6 years ago

Milestone: R1R1/beta1
Resolution: fixed
Status: newclosed

as no regressions have been reported and things seem stable, i'm going to archive this issue as fixed.

comment:5 by korli, 6 years ago

I know there are unhandled interrupts problems in intel_extreme. Dunno whether it's related or not though.

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