On Thu, Feb 05, 2015 at 09:22:49PM +0100, Jan Kokemüller wrote: > > On 04.02.2015 21:27, Lars Engels wrote: > > By the way on the X230 (IvyBridge i7) the loader.conf setting > > "drm.i915.enable_rc6=7" makes a huge difference. > > For some other reason I removed it from loader.conf and > > hw.acpi.battery.time showed 160 minutes. After re-adding it battery time > > went up to 230 minutes. > > I've been using the same setting for a while now and can confirm the > increase of battery life. It also makes a huge difference in fan noise > on my T420. > > Can you suspend/resume with rc6 on? I had to patch around a deadlock in > i915_irq.c: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=183859 > I haven't checked yet if this still occurs after the recent drm import.
Yes, I can suspend and resume several times. I haven't seen a broken s/r cycle since the latest drm import.
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