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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 74B6AC4361B for ; Thu, 17 Dec 2020 13:40:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2E99F2396D for ; Thu, 17 Dec 2020 13:40:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727246AbgLQNkf (ORCPT ); Thu, 17 Dec 2020 08:40:35 -0500 Received: from www74.your-server.de ([213.133.104.74]:58906 "EHLO www74.your-server.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727767AbgLQNkf (ORCPT ); Thu, 17 Dec 2020 08:40:35 -0500 Received: from sslproxy01.your-server.de ([78.46.139.224]) by www74.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92.3) (envelope-from ) id 1kptVT-000FAb-Bh; Thu, 17 Dec 2020 14:39:47 +0100 Received: from [95.91.111.52] (helo=[192.168.178.21]) by sslproxy01.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kptVT-0008Cg-5K; Thu, 17 Dec 2020 14:39:47 +0100 Subject: Re: Efistub patch breaks 5.10 for me To: Ard Biesheuvel Cc: Arvind Sankar , "Limonciello, Mario" , Jacobo Pantoja , Peter Jones , linux-efi References: <242ea718-89f8-e74f-e48a-e6b0fa436ed1@computerix.info> From: Klaus Kusche Message-ID: <21bee914-35d0-c33d-b68c-20574f8e6fb6@computerix.info> Date: Thu, 17 Dec 2020 14:39:46 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Authenticated-Sender: klaus.kusche@computerix.info X-Virus-Scanned: Clear (ClamAV 0.102.4/26019/Wed Dec 16 15:36:02 2020) Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org Hello, On 17/12/2020 13:41, Ard Biesheuvel wrote: >> tried to boot 5.10.1 (my first attempt to boot a 5.10.x). >> >> Displays >> >> EFI stub: WARNING: [Firmware Bug]: LoadOptions is an EFI_LOAD_OPTION descriptor >> EFI stub: WARNING: [Firmware Bug]: Using OptionalData as a workaround >> >> for one or two seconds on the notebook display. >> >> Then, the notebook display becomes completely black >> and the notebook does not boot and does not react to anything >> (hard poweroff needed). > > Hello Klaus, > > Please try reverting > > 4a568ce29d3f48df95919f82a80e4b9be7ea0dc1 > > "efi/x86: Add a quirk to support command line arguments on Dell EFI firmware" Thanks for the quick response. Efistub is *not* the culprit: With the patch reverted, the two efistub error messages are gone. And with the two errormessages not occupying the display and my attention, I noticed that the kernel actually came up for fractions of a second before the display went dark. AMD radeon seems to be the culprit: After unconfiguring it, the system comes up fine in text mode, both with and without the efistub patch. And with the efistub patch applied, dmesg actually shows an empty command line instead of the \x01, as it should. -- Prof. Dr. Klaus Kusche Private address: Rosenberg 41, 07546 Gera, Germany +49 365 20413058 klaus.kusche@computerix.info https://www.computerix.info Office address: DHGE Gera, Weg der Freundschaft 4, 07546 Gera, Germany +49 365 4341 306 klaus.kusche@dhge.de https://www.dhge.de