From owner-freebsd-x11@freebsd.org Wed Oct 21 21:56:49 2015 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 08C2AA1B942 for ; Wed, 21 Oct 2015 21:56:49 +0000 (UTC) (envelope-from henry.hu.sh@gmail.com) Received: from mail-vk0-x229.google.com (mail-vk0-x229.google.com [IPv6:2607:f8b0:400c:c05::229]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B799EF35; Wed, 21 Oct 2015 21:56:48 +0000 (UTC) (envelope-from henry.hu.sh@gmail.com) Received: by vkat63 with SMTP id t63so36792629vka.1; Wed, 21 Oct 2015 14:56:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type; bh=b3kLZxP7tbSeLg4kvKKLunnerH4XhnQ7LRCEQi2VnPM=; b=ktY/bamb1sm+5T5mvvxLT2OqlyAZilpirZ/1d2d8XQGbksXiwSl3HBEsdct6HvNVq2 4g+XkPFDd/pXLL4VY4b+wX4zDPckRalt6xIvvBJ978gAxPLCoeSDLqab77uAvSj5cm9v o2WrUT/A5igjsqOxGuWkG9UhglHrIraW4Jx+mZH+lPIX7NzYEzcEZLAmYUWb2GVA+t1e 9w8GkmIc0VXHujVgOQ1Io4eINk8omESER2z+PG9HN5GNhHNkXOf70xUST7shquh9DFwd bX5lIVCrh4FGF4cKa9z3WeCtvrlwYvSSmHKq6BX1uih6JpLXAb7uDJCv8EnIHrXMWu5z lU9A== X-Received: by 10.31.170.68 with SMTP id t65mr6717555vke.31.1445464607744; Wed, 21 Oct 2015 14:56:47 -0700 (PDT) MIME-Version: 1.0 Received: by 10.103.39.6 with HTTP; Wed, 21 Oct 2015 14:56:08 -0700 (PDT) In-Reply-To: References: <56224C70.8040906@FreeBSD.org> <28961.174542974$1445329913@news.gmane.org> <2055370.RNj6gJ7qL2@asbach.renzel.net> From: Henry Hu Date: Wed, 21 Oct 2015 17:56:08 -0400 Message-ID: Subject: Re: [patch] Testing the new i915 driver (rev. 3820047) To: "Ranjan1018 ." <214748mv@gmail.com> Cc: =?UTF-8?B?SmVhbi1Tw6liYXN0aWVuIFDDqWRyb24=?= , "freebsd-x11@freebsd.org" Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.20 X-BeenThere: freebsd-x11@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: X11 on FreeBSD -- maintaining and support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Oct 2015 21:56:49 -0000 On Wed, Oct 21, 2015 at 3:09 PM, Ranjan1018 . <214748mv@gmail.com> wrote: > Backlight support for the i915 driver via sysctl. > > Instructions: > Install the attached patch : > > # cd freebsd-base-graphics > # patch -p2 < i915_backlight.patch > > Rebuild, install and reboot the new kernel. > > Now you can control the backlight of your laptop via sysctl: > > set backlight to 10% > > # sysctl hw.dri.0.i915_backlight=10 > hw.dri.0.i915_backlight: 9 -> 10 > > set backlight to 20% > > # sysctl hw.dri.0.i915_backlight=20 > hw.dri.0.i915_backlight: 10 -> 20 > > increment the backlight > > # sysctl -n hw.dri.0.i915_backlight=1000 > 20 -> 25 > > decrement the backlight > > # sysctl -n hw.dri.0.i915_backlight=-1000 > 25 -> 20 > > decrement the backlight > > # sysctl hw.dri.0.i915_backlight=-1000 > hw.dri.0.i915_backlight: 20 -> 16 > > You can also set the initial backlight at boot in /boot/loader.conf : > > drm.i915.init_backlight=10 > > or via /etc/sysctl.conf > > hw.dri.0.i915_backlight=10 > > set a 10% backlight. > > I am running this patch on current for months on my Samsung Samsung ATIV > Book 2 270E5E with Intel HD Graphics 4000. > You can try graphics/intel-backlight, which does not require a kernel patch. > > Thanks, > Maurizio > > _______________________________________________ > freebsd-x11@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-x11 > To unsubscribe, send any mail to "freebsd-x11-unsubscribe@freebsd.org" > -- Cheers, Henry