From owner-freebsd-x11@FreeBSD.ORG Sat Feb 7 01:15:07 2015 Return-Path: Delivered-To: freebsd-x11@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 96A5EA1D for ; Sat, 7 Feb 2015 01:15:07 +0000 (UTC) Received: from mail-pd0-f179.google.com (mail-pd0-f179.google.com [209.85.192.179]) (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 6BEF6B54 for ; Sat, 7 Feb 2015 01:15:07 +0000 (UTC) Received: by pdjg10 with SMTP id g10so11991858pdj.1 for ; Fri, 06 Feb 2015 17:14:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=ItkxXaFyQozoFaoSC4hTXzLZHD+j8sggXcWaFIZLAzM=; b=T1Mh+OLzdil7sGKVwx2VtadwjJtJilZ1plJtOJWHXLlXahT0suPqZlVumNvVSu5Jou wg8m+QBg04eqkzW0qCYr0M+g5fZ7J163ZLCo/PeGpXGbDYeUFV9Rp3oYDQZ8JQm7AI5c StPlWO3mgfaZBtGVZV/rw2ygU+epHKTCrL47hrVqkXQ3cN0tFNd3dCahRTtlxp7iqW3Q gN6CDfg9ZG9npXrzpc76NLf9OB3M+/SEAuE5Ij+35Ce4Q0+LM1ojGBtgGMDVyvLOEonu gfINhVnFAU9Dbtej/HUSwnLXMPfHXYNMN0wMPp3CyElQyHhi9tiTCsO2vVyVtWDGBBg0 j9bg== MIME-Version: 1.0 X-Received: by 10.68.68.131 with SMTP id w3mr10128505pbt.132.1423271699836; Fri, 06 Feb 2015 17:14:59 -0800 (PST) Sender: kob6558@gmail.com Received: by 10.67.22.231 with HTTP; Fri, 6 Feb 2015 17:14:59 -0800 (PST) In-Reply-To: <54D52600.40102@gmail.com> References: <54D52600.40102@gmail.com> Date: Fri, 6 Feb 2015 17:14:59 -0800 X-Google-Sender-Auth: Gg5QMijQBU14uWx7T9WkIkShM2I Message-ID: Subject: Re: Intel i915 support for RC6 From: Kevin Oberman To: =?UTF-8?Q?Jan_Kokem=C3=BCller?= Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: "freebsd-x11@freebsd.org" X-BeenThere: freebsd-x11@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: X11 on FreeBSD -- maintaining and support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 07 Feb 2015 01:15:07 -0000 On Fri, Feb 6, 2015 at 12:37 PM, Jan Kokem=C3=BCller wrote: > > Is '7' reasonable and, if so, what do the other two bits do? > > The value of the sysctl is interpreted as a bitmask. There are three > different RC6 levels: RC6, RC6p and RC6pp. RC6pp is the deepest one with > the largest power savings. > Setting it to 7 enables all modes. dmesg then says: > > "info: [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp on" > > I would set it to 7 unless it makes the system unstable. RC6p seems to be > broken on Sandy Bridge but it is automatically disabled there. > Thanks, Jan. I'll give it a try next boot. -- Kevin Oberman, Network Engineer, Retired E-mail: rkoberman@gmail.com