Opened 16 months ago

Closed 6 months ago

Last modified 6 months 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


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 16 months ago.

Download all attachments as: .zip

Change History (6)

comment:1 Changed 16 months ago by kallisti5

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.

Changed 16 months ago by kallisti5


comment:2 Changed 16 months ago by kallisti5

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:3 Changed 16 months ago by kallisti5

comment:4 Changed 6 months ago by kallisti5

  • Milestone changed from R1 to R1/beta1
  • Resolution set to fixed
  • Status changed from new to closed

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

comment:5 Changed 6 months ago by korli

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

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