From owner-freebsd-bugs@freebsd.org Wed Aug 24 16:54:05 2016 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DCF10BC3D90 for ; Wed, 24 Aug 2016 16:54:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CCA7C17B2 for ; Wed, 24 Aug 2016 16:54:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u7OGs5hC001169 for ; Wed, 24 Aug 2016 16:54:05 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 212117] Excessive power consumption in VT Date: Wed, 24 Aug 2016 16:54:05 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: johannes@brilliantservice.co.jp X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Aug 2016 16:54:06 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D212117 Bug ID: 212117 Summary: Excessive power consumption in VT Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: johannes@brilliantservice.co.jp I am concerned that there might be something in VT that are causing high po= wer consumption. At login prompt FreeBSD 12-CURRENT on my UP board (Intel Cherryview) the po= wer consumption is steady at 5W when idle, measured with a watt meter on the 12= 0V side. When I do kldload i915kms the power consumption drops to 4W. As comparison, even running a simple OpenGL app with 60 fps refresh rate in KMS mode does = not cause higher consumption than 4-5W. Starting X brings it up to around ~5W again. In /boot/loader.conf I'm loading zfs coretemp acpi_video CPU is 99.8% idle when running top in from ssh login.=20 The watt meter only show whole watts so the difference might not be as big = as 1 watt but there definitely is a difference. As someone else said in the mail= ing list, the difference is so big in their system it causes the fans to run hi= gh and changing to syscons solved the problem.=20 https://lists.freebsd.org/pipermail/freebsd-x11/2016-August/017860.html --=20 You are receiving this mail because: You are the assignee for the bug.=