From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: Re: [BUG] i915/intel-acpi.c: failed to get supported _DSM functions (was: [Dual-LVDS Acer Iconia laptop] i915/DRM issue: one screen stays off) Date: Tue, 6 Dec 2011 13:46:07 +0000 Message-ID: <20111206134607.GA11462@srcf.ucam.org> References: <20111204160728.GA27292@archminux> <1323054041.6046.79.camel@linux-s257.site> <20111205205647.GA1757@archminux> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20111205205647.GA1757@archminux> Sender: platform-driver-x86-owner@vger.kernel.org To: intel-gfx@lists.freedesktop.org, joeyli , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, platform-driver-x86@vger.kernel.org, linux-acpi@vger.kernel.org List-Id: linux-acpi@vger.kernel.org On Mon, Dec 05, 2011 at 09:56:47PM +0100, Baptiste Jonglez wrote: > CC-ing intel-gfx@lists.freedesktop.org (see below) > On Mon, Dec 05, 2011 at 11:00:41AM +0800, joeyli wrote: > > > [drm:intel_dsm_pci_probe] *ERROR* failed to get supported _DSM functions > > > > > > (attached is the relevant part of dmesg [1]) > > > > > > > > > > Have no idea for this _DSM error, need help from drm and acpi experts. > > It definitely looks like an ACPI issue. > That function is defined in `drivers/gpu/drm/i915/intel_acpi.c'. > The whole file was added more than a year ago by commit 723bfd707a97 > (see the relevant thread on intel-gfx@ [1]) to "add _DSM support". > One of the first comment is about "Calpella", which is exactly the > platform of my laptop (as shown by lshw) Ignore that - it's entirely harmless. -- Matthew Garrett | mjg59@srcf.ucam.org