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Thu, 15 Jan 2026 11:36:53 -0500 X-MC-Unique: EF4CM8dfMF-Md1jPR3oF-A-1 X-Mimecast-MFC-AGG-ID: EF4CM8dfMF-Md1jPR3oF-A_1768495009 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id DD6D7180035D; Thu, 15 Jan 2026 16:36:47 +0000 (UTC) Received: from sirius.home.kraxel.org (unknown [10.45.224.56]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CFC961955F22; Thu, 15 Jan 2026 16:36:45 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 9866C18483A0; Thu, 15 Jan 2026 17:36:43 +0100 (CET) Date: Thu, 15 Jan 2026 17:36:43 +0100 From: Gerd Hoffmann To: Ville =?utf-8?B?U3lyasOkbMOk?= Cc: Christian =?utf-8?B?S8O2bmln?= , Thomas Zimmermann , Zack Rusin , dri-devel@lists.freedesktop.org, Alex Deucher , amd-gfx@lists.freedesktop.org, Ard Biesheuvel , Ce Sun , Chia-I Wu , Danilo Krummrich , Dave Airlie , Deepak Rawat , Dmitry Osipenko , Gurchetan Singh , Hans de Goede , Hawking Zhang , Helge Deller , intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, Jani Nikula , Javier Martinez Canillas , Jocelyn Falempe , Joonas Lahtinen , Lijo Lazar , linux-efi@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, Lucas De Marchi , Lyude Paul , Maarten Lankhorst , "Mario Limonciello (AMD)" , Mario Limonciello , Maxime Ripard , nouveau@lists.freedesktop.org, Rodrigo Vivi , Simona Vetter , spice-devel@lists.freedesktop.org, Thomas =?utf-8?Q?Hellstr=C3=B6m?= , Timur =?utf-8?Q?Krist=C3=B3f?= , Tvrtko Ursulin , virtualization@lists.linux.dev, Vitaly Prosyak Subject: Re: [PATCH 00/12] Recover sysfb after DRM probe failure Message-ID: References: <20251229215906.3688205-1-zack.rusin@broadcom.com> <97993761-5884-4ada-b345-9fb64819e02a@suse.de> <9058636d-cc18-4c8f-92cf-782fd8f771af@amd.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Hi, > > At least for AMD GPUs remove_conflicting_devices() really early is > > necessary because otherwise some operations just result in a > > spontaneous system reboot. > It's similar for Intel. For us VGA emulation won't be used for EFI > boot, but we still can't have the previous driver poking around in > memory while the real driver is initializing. The entire memory layout > may get completely shuffled so there's no telling where such memory > accesses would land. Can you do stuff like checking which firmware is needed and whenever that can be loaded from the filesystem before calling remove_conflicting_devices() ? take care, Gerd