#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: | ||
| 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 (6)
comment:1 by , 11 years ago
comment:2 by , 11 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:3 by , 11 years ago
https://wiki.ubuntu.com/Kernel/PowerManagementRC6 has more general info on RC6
comment:4 by , 11 years ago
| Milestone: | R1 → R1/beta1 |
|---|---|
| Resolution: | → fixed |
| Status: | new → closed |
as no regressions have been reported and things seem stable, i'm going to archive this issue as fixed.
comment:5 by , 11 years ago
I know there are unhandled interrupts problems in intel_extreme. Dunno whether it's related or not though.
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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.