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x-vs=clean score=0 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfDtEKMDQzd/y8BT3xkRA3P/Lm4FKiKPYA5+M4jwyk1rm/e0neZLjtstW52edowQAT6mVDS+kqBE4Usj8RjsXzY6R/4B04Q0iIZplOUftpUiSNPQ4HK2M AgyW8aD3HoVs2csXPqclQjPajH072V2fYULUtRD4UUkW4dc8P0EgYcGRzwCcmlcClrsVEIm2pBaRzl4efxvhHuREF4pgMwizx1vX2V2ExfNlehcTYmCDAO/H X-CM-Analysis: v=2.3 cv=E8HjW5Vl c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=kj9zAlcOel0A:10 a=VUJBJC2UJ8kA:10 a=iLNU1ar6AAAA:8 a=VwQbUJbxAAAA:8 a=zLoA9V-_IBI5EWoYkqoA:9 a=CjuIK1q_8ugA:10 a=x8gzFH9gYPwA:10 a=AjGcO6oz07-iQ99wixmX:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750862AbeEPQjX (ORCPT ); Wed, 16 May 2018 12:39:23 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:39429 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750778AbeEPQjW (ORCPT ); Wed, 16 May 2018 12:39:22 -0400 X-ME-Proxy: X-ME-Proxy: X-ME-Proxy: X-ME-Proxy: X-ME-Proxy: X-ME-Proxy: X-ME-Sender: Date: Wed, 16 May 2018 18:39:05 +0200 From: Greg KH To: Mario.Limonciello@dell.com Cc: heikki.krogerus@linux.intel.com, pmenzel+linux-usb@molgen.mpg.de, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: `ucsi_acpi: probe of USBC000:00 failed with error -12` on Dell XPS 13 9370 Message-ID: <20180516163905.GE20425@kroah.com> References: <9365397f-7206-728e-ee76-146629bfd186@molgen.mpg.de> <20180515160047.GB26720@kroah.com> <69da4aa4-3d4b-0ffc-81ce-500713cd3743@molgen.mpg.de> <20180516080226.GC3536@kroah.com> <20180516115814.GB11469@kuha.fi.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.5 (2018-04-13) Sender: linux-usb-owner@vger.kernel.org X-Mailing-List: linux-usb@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Wed, May 16, 2018 at 04:13:31PM +0000, Mario.Limonciello@dell.com wrote: > > > [1] When the power supply for the docking station is bigger than the > > > laptop's power supply, you begin to wonder what is in that thing and > > > stop using it after a while... > > Mostly to satisfy letting the docking station work with beefier machines and > still deliver power up to what USB PD will negotiate. > I think they can actually run with smaller power supplies but you will need > something "a little" bigger than regular system power supply to power the > dock and system both. Given the date of my docking station (2+ years old), I would be _amazed_ if it could do USB PD. But I should go try it, my existing Dell laptop doesn't support that, but I have an Acer here, along with some chromebooks that do. I guess I need to go get the latest Dell laptop, "just to test" with :) thanks, greg k-h