From owner-freebsd-current@FreeBSD.ORG Tue Feb 17 00:03:39 2015 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 7BB334AA for ; Tue, 17 Feb 2015 00:03:39 +0000 (UTC) Received: from mail.grem.de (outcast.grem.de [213.239.217.27]) by mx1.freebsd.org (Postfix) with SMTP id CEC647E1 for ; Tue, 17 Feb 2015 00:03:37 +0000 (UTC) Received: (qmail 79256 invoked by uid 89); 17 Feb 2015 00:03:30 -0000 Received: from unknown (HELO bsd64.grem.de) (mg@grem.de@194.97.158.66) by mail.grem.de with ESMTPA; 17 Feb 2015 00:03:30 -0000 Date: Tue, 17 Feb 2015 01:03:27 +0100 From: Michael Gmelin To: Ian FREISLICH Subject: Re: r277959 breaks X display on IvyBridge mobile GT2 IG Message-ID: <20150217010327.1119a57f@bsd64.grem.de> In-Reply-To: References: X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.25; amd64-portbld-freebsd10.0) X-Face: $wrgCtfdVw_H9WAY?S&9+/F"!41z'L$uo*WzT8miX?kZ~W~Lr5W7v?j0Sde\mwB&/ypo^}> +a'4xMc^^KroE~+v^&^#[B">soBo1y6(TW6#UZiC]o>C6`ej+i Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAAJFBMVEWJBwe5BQDl LASZU0/LTEWEfHbyj0Txi32+sKrp1Mv944X8/fm1rS+cAAAACXBIWXMAAAsTAAAL EwEAmpwYAAAAB3RJTUUH3wESCxwC7OBhbgAAACFpVFh0Q29tbWVudAAAAAAAQ3Jl YXRlZCB3aXRoIFRoZSBHSU1QbbCXAAAAAghJREFUOMu11DFvEzEUAGCfEhBVFzuq AKkLd0O6VrIQsLXVSZXoWE5N1K3DobBBA9fQpRWc8OkWouaIjedWKiyREOKs+3PY fvalCNjgLVHeF7/3bMtBzV8C/VsQ8tecEgCcDgrzjekwKZ7TwsJZd/ywEKwwP+ZM 8P3drTsAwWn2mpWuDDuYiK1bFs6De0KUUFw0tWxm+D4AIhuuvZqtyWYeO7jQ4Aea 7jUqI+ixhQoHex4WshEvSXdood7stlv4oSuFOC4tqGcr0NjEqXgV4mMJO38nld4+ xKNxRDon7khyKVqY7YR4d+Cg0OMrkWXZOM7YDkEfKiilCn1qYv4mighZiynuHHOA Wq9QJq+BIES7lMFUtcikMnkDGHUoncA+uHgrP0ctIEqfwLHzeSo+eUA66AqzwN6n 2ZHJhw6Qh/PoyC/QENyEyC/AyNjq74Bs+3UH0xYwzDUC4B97HgLocg1QLYgDDO1v f3UX9Y307Ew4AHh67YAFFsxEpkXwpXY3eIgMhAAE3R19L919nNnuD2wlPcDE3UeT L2ytEICQib9BXgS2fU8PrD82ToYO1OEmMSnYTjSqSv9wdC0tPYC+rQRQD9ESnldF CyqfmiYW+tlALt8gH2xrMdC/youbjzPXEun+/ReXsMCDyve3dZc09fn2Oas8oXGc Jj6/fOeK5UmSMPmf/jL+GD8BEj0k/Fn6IO4AAAAASUVORK5CYII= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: Adrian Chadd , freebsd-current X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Feb 2015 00:03:39 -0000 On Mon, 16 Feb 2015 15:45:46 -0800 Adrian Chadd wrote: > On 16 February 2015 at 14:40, Ian FREISLICH > wrote: > > Ian FREISLICH wrote: > >> Adrian Chadd wrote: > >> > Hi, > >> > > >> > >> > There's a "invert backlight" option in i915, try setting it to 1? > >> > >> This is pretty much all I could find (unless I was looking in the > >> wrong place). It makes no difference. The backlight appears to > >> be disabled. > > > > Adrian, do you have any idea how to fix the backlight for my laptop? > > I ended up reversing out your change r277959 in my local copy to > > make the backlight work again here. > > Hi, > > I don't, no. I haven't dug further into the i915 backlight control > code because, well, a lot of changed in that update. The backlight > code was in a lot of flux during the period of time kib chose to fast > forward, so it's not unsurprising that it broke for some. > > I think for now we'll need a quirk that can be added for each laptop > we find with that particular behaviour. The real solution is to > continue sliding i915 forward in time. > In the meantime this workaround might be useful (not sure if it works while the driver is loaded): https://github.com/grembo/intel_backlight_fbsd -- Michael Gmelin