Opened 5 months ago
Last modified 5 months ago
#9343 new enhancement
intel extreme needs rc6 power downclocking
| Reported by: | kallisti5 | Owned by: | axeld |
|---|---|---|---|
| Priority: | low | Milestone: | R1 |
| 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)
Change History (4)
comment:1 Changed 5 months ago by kallisti5
comment:2 Changed 5 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 5 months ago by kallisti5
https://wiki.ubuntu.com/Kernel/PowerManagementRC6 has more general info on RC6
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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.