From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baptiste Jonglez Subject: Re: [Dual-LVDS Acer Iconia laptop] i915/DRM issue: one screen stays off [3.2-rc4+] Date: Tue, 6 Dec 2011 23:31:09 +0100 Message-ID: <20111206223109.GA1867@archminux> References: <20111204160728.GA27292@archminux> <1323054041.6046.79.camel@linux-s257.site> <20111206215137.GA20907@archminux> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from lvps80-90-199-152.vps.webfusion.co.uk ([80.90.199.152]:51545 "EHLO lvps80-90-199-152.vps.webfusion.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753481Ab1LFWbq (ORCPT ); Tue, 6 Dec 2011 17:31:46 -0500 Content-Disposition: inline In-Reply-To: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Benjamin Tissoires Cc: joeyli , Baptiste Jonglez , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, platform-driver-x86@vger.kernel.org, linux-acpi@vger.kernel.org, Chris Wilson , intel-gfx@lists.freedesktop.org, Mathieu Magnaudet On Tue, Dec 06, 2011 at 11:12:26PM +0100, Benjamin Tissoires wrote: > Hi Baptiste, Hi, > On Tue, Dec 6, 2011 at 22:51, Baptiste Jonglez wrote: > > The second screen works fine with the attached patch. It actually is > > 6 months old but seems to have been lost in the wild... > > You don't have the problem of the second backlight still off? > On our Iconia, we need to trigger a special DMI command to set it up > (SDSS, IIRC). No, with the patch, it worked out-of-the-box. I can even control the brightness in `/sys/class/backlight/acpi_video0/brightness' (it affects both displays at the same time though). But even at 0, it's still perfectly readable. Maybe this a bug that got fixed recently? I've actually tried the 3.1 kernel (and then the 3.2-rc4) because I noticed a lot of commits and improvements in the i915 driver recently. > > Thanks Benjamin! > > All the credits are from Ajax and somebody else on IRC I don't recall, > really sorry. Thanks to them. > > Cheers, > Benjamin. Regards, Baptiste