From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mario Limonciello Subject: Re: [SUSPECT SPAM] Re: [PATCH] Add a quirk for the Dell XPS 13 (2015) when in PS/2 mode. Date: Wed, 25 Feb 2015 12:16:57 -0600 Message-ID: <54EE1199.3090501@dell.com> References: <1424310180-2512-1-git-send-email-mario_limonciello@dell.com> <201502221755.05587@pali> <54EBB868.2040405@dell.com> <201502240101.45446@pali> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <201502240101.45446@pali> Sender: linux-kernel-owner@vger.kernel.org To: =?UTF-8?B?UGFsaSBSb2jDoXI=?= Cc: Dmitry Torokhov , LKML , "linux-input@vger.kernel.org" , Rob List-Id: linux-input@vger.kernel.org On 02/23/2015 06:01 PM, Pali Roh=C3=A1r wrote: > On Tuesday 24 February 2015 00:31:52 Mario Limonciello wrote: > For older dell models (some old inspirions and maybe also > latitude) it was possible to use undocumented DELLDIAG interface > (which enter into SMM mode and call some functions) to enable > that "RAW" mode. > > Now when you are discussing with us, do you have some information > or can you comment (if it is not secret) that DELLDIAG SMM > interface? > > In linux kernel we have for it driver (provides info about > temperature, fan speed, power management, hotkeys, ...), but it > use undocumented interface (and sometimes it has problems): > > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/= drivers/char/i8k.c I don't have any more information I can share on this interface other t= han I wouldn't recommend to rely on it. It's generally not supposed to= be used by the OS but only for diagnostic purposes from BIOS level dia= gnostic tools. > Nothing new. It is that problem with repeating keys which is > fixed by last version of BIOS. > > I saw one E6440 model with preinstalled Ubuntu 12.04.2 and > distributed with A08 BIOS (which had that problem). And this was > very very annoying! You could imagine it, you buy new Latitude > (business class pro notebook), you started it and on preinstalled > OS, keyboard is not usable. Updating to A10 fixed it. > I'm sorry that this had actually made it out the door with a pre-instal= led machine, but I'm glad we were able to get it fixed in the field. > In this forum thread people reported that "repeating keys" > problem for more models: http://en.community.dell.com/support-forums/= laptop/f/3518/t/19593360?pi239031352=3D19 Yes, there is a support agent in that thread relaying those models to t= he BIOS team. > And it looks like (from what I'm reading) last version A10 of > E6440 BIOS broke USB3.0 support. >