From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario Limonciello Subject: Re: commit b1ef29725865 (ACPI _REV=2) causes sound regression on Dell XPS 13 [Was: Discussion around quirking the _REV behavior for the XPS 13 (2015) until 4.2] Date: Mon, 11 May 2015 14:01:11 -0500 Message-ID: <5550FC77.5000401@dell.com> References: <55401602.5050907@dell.com> <55480021.1090402@dell.com> <20150511182658.GA8516@isilmar-3.linta.de> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from AUSXIPPS310.us.dell.com ([143.166.148.211]:25244 "EHLO ausxipps310.us.dell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752855AbbEKTB0 (ORCPT ); Mon, 11 May 2015 15:01:26 -0400 In-Reply-To: <20150511182658.GA8516@isilmar-3.linta.de> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Dominik Brodowski , "robert.moore@intel.com" , "lv.zheng@intel.com" , "rafael.j.wysocki@intel.com" Cc: "linux-acpi@vger.kernel.org" , "broonie@kernel.org" , "han.lu@intel.com" , "yang.jie@intel.com" , "alsa-devel@alsa-project.org" On 05/11/2015 01:26 PM, Dominik Brodowski wrote: > Hi, > > (CC'ing sound experts) > > indeed, commit b1ef29725865 causes a severe regression -- actually, it > causes sound to be totally unusuable on the Dell XPS 13 (2015) on > Debian jessie, while it works fine in 4.0 / with b1ef29725865 reverted. > > According to an off-list discussion, the sound breakage (and not just some > jack detection issue) seems to be caused due to alsa-lib being too old. > The matter is further complicated by the issue that the driver > asks for some firmware blob intel/IntcPP01.bin which (at least) I > cannot find anywhere. > > Under the no-regression rule, this means that either b1ef29725865 needs > to be reverted or we need to find another solution to this matter, such as > an override. And I think it is needed for longer than just for 4.1, as it > will continue to be cause regressions on quite recent userspace. > > Best, > Dominik > > > PS/OT: Probably I'm preaching to the choir, but @Mario: it's a pity the > XPS (or some versions of it) with pre-installed Ubuntu actually ships > with a Wifi adapter which seems to be unsupported by upstream Linux... > > Dominik, Yes I've noticed it's acting much worse for me too with 4.1-rc2 on Ubuntu 15.04 userspace (which is quite new indeed). I really think the right solution is some sort of quirk against the XPS 13 on the _REV behavior until this is reasonably mature. OT: Yes, this feedback has been taken to heart by the team. We're working on adding more variants with alternate adapters. :)