I'm seeing the same behavior with a i5-2410M (also on a Thinkpad X220).
With i915.i915_enable_rc6=1, power usage is ~12W, but textures seem to get corrupted over time.
Without rc6, power usage on idle is ~20W, but graphics are fine.
I'm seeing the same behavior with a i5-2410M (also on a Thinkpad X220).
With i915.i915_ enable_ rc6=1, power usage is ~12W, but textures seem to get corrupted over time.
Without rc6, power usage on idle is ~20W, but graphics are fine.