Date: Mon, 21 Mar 2016 01:23:30 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 207889] Significant increase in Sandy Bridge laptop power consumption after Linux 3.8 i915 update Message-ID: <bug-207889-8-mX5LIMgL7x@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-207889-8@https.bugs.freebsd.org/bugzilla/> References: <bug-207889-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D207889 --- Comment #3 from Ed Maste <emaste@freebsd.org> --- (In reply to Jan Bramkamp from comment #1) I tried with enable_rc6 set to 0, 1, and 7. One other note: When I observed excessive power consumption the "residency since boot" counters were static in "sysctl hw.dri.0.info.i915_drpc_info" output. "RC6 residency since boot" was high and unchanging, while the other= two were zero. This is similar to a report in a comment in https://bugs.freedesktop.org/show_bug.cgi?id=3D54089 The Linux commit that introduced this regression is b4ae3f22d238617ca11610b29fde16cf8c0bc6e0, which was in response to https://bugs.freedesktop.org/show_bug.cgi?id=3D50237 . Disabling the MBCTL= write from that commit, on Sandy Bridge, restores the power consumption to normal. --=20 You are receiving this mail because: You are the assignee for the bug.=
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