From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECF16C54E94 for ; Mon, 23 Jan 2023 12:14:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229579AbjAWMOt (ORCPT ); Mon, 23 Jan 2023 07:14:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229548AbjAWMOt (ORCPT ); Mon, 23 Jan 2023 07:14:49 -0500 X-Greylist: delayed 344 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 23 Jan 2023 04:14:48 PST Received: from bmailout2.hostsharing.net (bmailout2.hostsharing.net [83.223.78.240]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E91218140; Mon, 23 Jan 2023 04:14:48 -0800 (PST) Received: from h08.hostsharing.net (h08.hostsharing.net [83.223.95.28]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "*.hostsharing.net", Issuer "RapidSSL Global TLS RSA4096 SHA256 2022 CA1" (verified OK)) by bmailout2.hostsharing.net (Postfix) with ESMTPS id F1E092800C981; Mon, 23 Jan 2023 13:09:00 +0100 (CET) Received: by h08.hostsharing.net (Postfix, from userid 100393) id E5AD02DEC14; Mon, 23 Jan 2023 13:09:00 +0100 (CET) Date: Mon, 23 Jan 2023 13:09:00 +0100 From: Lukas Wunner To: Hans de Goede Cc: "Rafael J . Wysocki" , Len Brown , Aditya Garg , Mark Gross , linux-acpi@vger.kernel.org, Andy Shevchenko , platform-driver-x86@vger.kernel.org Subject: Re: [PATCH 0/3] ACPI: video/apple-gmux: Improve apple-gmux backlight detection Message-ID: <20230123120900.GA1924@wunner.de> References: <20230123113750.462144-1-hdegoede@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230123113750.462144-1-hdegoede@redhat.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org On Mon, Jan 23, 2023 at 12:37:47PM +0100, Hans de Goede wrote: > Some apple laptop models have an ACPI device with a HID of APP000B > and that device has an IO resource (so it does not describe the new > unsupported MMIO based gmux type), but there actually is no gmux > in the laptop at all. > > This patch-series improves the drivers/acpi/video_detect.c so that > it no longer tries to use the non present gmux in this case. > > Note I'm still waiting for testing feedback from the reporter of > this problem. But from the logs the problem is clear > (the logs show: "apple_gmux: gmux device not present") Please provide a link to the original report. I would also like to know the exact MacBook model used and I would like to see full dmesg output as well as an acpidump. What you're saying here is that there's a fake APP000B device present in DSDT and I have a hard time believng that. We need to find out what's really going on and how macOS handles this. Thanks, Lukas