From owner-freebsd-x11@freebsd.org Thu Mar 10 02:18:17 2016 Return-Path: Delivered-To: freebsd-x11@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 BAF82ACAF2D for ; Thu, 10 Mar 2016 02:18:17 +0000 (UTC) (envelope-from 010001535e4a3ff9-1c85dd87-e3cc-4de4-a9a6-5c94a1d2c9ee-000000@amazonses.com) Received: from a8-26.smtp-out.amazonses.com (a8-26.smtp-out.amazonses.com [54.240.8.26]) (using TLSv1 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 827501B93 for ; Thu, 10 Mar 2016 02:18:17 +0000 (UTC) (envelope-from 010001535e4a3ff9-1c85dd87-e3cc-4de4-a9a6-5c94a1d2c9ee-000000@amazonses.com) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=vnqrkfnvu6csdl6mwgk5t6ix3nnepx57; d=tarsnap.com; t=1457575837; h=Subject:To:References:Cc:From:Message-ID:Date:MIME-Version:In-Reply-To:Content-Type:Content-Transfer-Encoding; bh=CUBuLtAyLmpnqj7brMVXv2ElDhuInMwJPaOjCeatWiY=; b=D2wAUdZA+MLFB1hm9n148yNXfeA/hhFvyRvgqgqaGpZoZeJxKZ2jf/zNvbWq/7HZ qTgDlk6kt8j8kFEI06YBu67VwT15n0fsoD9KtGGsGa0O5B9MkuH4S6MqpWDQZoGXJ1w Hosxl0Ynbxh27XwQDlEhSKZ4tcMcfRAta5Bl8+PA= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=ug7nbtf4gccmlpwj322ax3p6ow6yfsug; d=amazonses.com; t=1457575837; h=Subject:To:References:Cc:From:Message-ID:Date:MIME-Version:In-Reply-To:Content-Type:Content-Transfer-Encoding:Feedback-ID; bh=CUBuLtAyLmpnqj7brMVXv2ElDhuInMwJPaOjCeatWiY=; b=a4Ppnnd16/LD22MRajEegF9UYTnJznoTmK3mHDwQ/L8YKehUJ8EWcJ4J5pDfxbDx eLHRGAhMMzPzxa/tJUlC2ej1mXrYZ+WoYRcMJWwiuYkNv4tlRbdFQpb555g+6aAScmp 9chg6grzb5nuQ8qCIsls6oUT4W5FEOyEuacviSvI= Subject: Re: i915 update to Linux 3.8 ready! To: Ed Maste , =?UTF-8?Q?Jean-S=c3=a9bastien_P=c3=a9dron?= References: <56D9CE73.7040601@FreeBSD.org> <56DF3F20.8010208@FreeBSD.org> Cc: "freebsd-x11@freebsd.org" From: Colin Percival Message-ID: <010001535e4a3ff9-1c85dd87-e3cc-4de4-a9a6-5c94a1d2c9ee-000000@email.amazonses.com> Date: Thu, 10 Mar 2016 02:10:37 +0000 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-SES-Outgoing: 2016.03.10-54.240.8.26 Feedback-ID: 1.us-east-1.Lv9FVjaNvvR5llaqfLoOVbo2VxOELl7cjN0AOyXnPlk=:AmazonSES X-BeenThere: freebsd-x11@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: X11 on FreeBSD -- maintaining and support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Mar 2016 02:18:17 -0000 On 03/09/16 12:06, Ed Maste wrote: > On 8 March 2016 at 16:07, Jean-Sébastien Pédron wrote: >> The i915 update is now in HEAD as of r296548: >> https://lists.freebsd.org/pipermail/svn-src-head/2016-March/083332.html > > This is on a Thinkpad X220 (Sandy Bridge). It has a r286085 kernel > installed on the disk, and reports 11W while idle at a vt(4) console > without the driver loaded. After loading i915kms.ko but still at the > vt(4) console that increased to 14W. > > Booting from a USB stick at r296565 showed 13W initially, rising to > 25W after loading i915kms.ko. I'll continue to investigate, but would > like to know what others observe with respect to power consumption on > other laptops. On my laptop the new code significantly reduces power consumption. Laptop is a Dell Latitude E7440 with an Intel Core i5-4300U: * 7260 wifi replaced with an Atheros card; connected but idle * powerd is running with default settings * backlight brightness is at the default setting Power consumption measured as the median of 15 values from # while true; do acpiconf -i 0 | grep rate; sleep 10; done 11-CURRENT r296546 (old bits) OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.6, 256 bits) vt w/o i915kms.ko: 9952 mW vt w/ i915kms.ko: 9953 mW KDE idle, screen on: 11664 mW KDE idle, screen off: 6041 mW 11-CURRENT r296548 (new bits) OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile vt w/o i915kms.ko: 9958 mW vt w/ i915kms.ko: 9241 mW KDE idle, screen on: 9377 mW KDE idle, screen off: 5295 mW So basically loading the new i915kms.ko saves ~ 0.72 W in a text console; ~ 0.75 W in KDE with the screen off; and ~ 2.29 W in KDE with the screen on. -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid