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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C076BC433F5 for ; Fri, 12 Nov 2021 13:33:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A819A60F5B for ; Fri, 12 Nov 2021 13:33:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235121AbhKLNf4 (ORCPT ); Fri, 12 Nov 2021 08:35:56 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:24380 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235014AbhKLNfr (ORCPT ); Fri, 12 Nov 2021 08:35:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1636723976; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3FqzlM6+St6bQetl39I3gwMqH+GHqZeZ7fYAU6/+0T4=; b=UQd3D7ucaCKOOT3j3nUoLV7EugYXI1C721ZYulLCx+HQ/Sus3M1z5z/PTwZi64px4uhRSW V65SO0EHh784KUxk9CtyASbEX/vjsZQVfHxxL3Eu2gO4rFO0rl4UCmaxidjxnEup0/x2/5 wh72LYjDV7jkNCsK15j6+K+k9aS5IgU= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-495-g3_etzNbMVKhTzxU2FPUJA-1; Fri, 12 Nov 2021 08:32:54 -0500 X-MC-Unique: g3_etzNbMVKhTzxU2FPUJA-1 Received: by mail-wm1-f72.google.com with SMTP id 145-20020a1c0197000000b0032efc3eb9bcso6326862wmb.0 for ; Fri, 12 Nov 2021 05:32:54 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3FqzlM6+St6bQetl39I3gwMqH+GHqZeZ7fYAU6/+0T4=; b=hQ9Tde6mHkA1uYqtfkxnDLn0ISIp1gL+Kg11oliFz6Mt6nwKgS9qWFU6ygJqPM+/Nm 8NaYUd2OQqT5WA2YOeISnIHtq4jmoujhK5QWYB/cI2/wazKZfo0xFv1nkNTzelspsTFB Wqpvq1FJA4+yc7XafGSU+gq0QMe2aU1EiYUE2JpxXegzIrsZ+RvD1q3MHaCS8OKm1o00 paY8hfDfV3e+RoG3QzDpaxC0xyIEFqEC3xkQ6bCdwcJunMAulpT1EofpDZNvy50dQ6pF 1IPL1de6fmpQZMzs3wh9l4xjlH62eTZWxWF1quSHbcVkSV5LerDvB00XX8VDy2LbcQ5G zmgw== X-Gm-Message-State: AOAM531VJCGPZU6SjKaNJB+jHBc1PSm9x0k3LAiA0XouP9auzLZYDpP2 pVHQykeDEIFudKvKkHn6xLc7KCHb83ZBlfajuuDlCHkN7g9ggAE8/WT08YxnxR7kz4rN22OGvgn sFD75romtrkVeQU1tKJ/5KAU8WRFMFljGMz0+VTQv1btMQTteqG/Vt8zejnhCE6hrEK9lXtfj6M E= X-Received: by 2002:a05:600c:c1:: with SMTP id u1mr34049727wmm.163.1636723973552; Fri, 12 Nov 2021 05:32:53 -0800 (PST) X-Google-Smtp-Source: ABdhPJxXhf8o+Hmrcc8jR2g8wf726UvSKzVQSsR1IKzZrdqoEz7h67KIvU9EZPqzf/sK1e/whAJWug== X-Received: by 2002:a05:600c:c1:: with SMTP id u1mr34049692wmm.163.1636723973313; Fri, 12 Nov 2021 05:32:53 -0800 (PST) Received: from minerva.home ([92.176.231.106]) by smtp.gmail.com with ESMTPSA id z12sm5733470wrv.78.2021.11.12.05.32.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Nov 2021 05:32:53 -0800 (PST) From: Javier Martinez Canillas To: linux-kernel@vger.kernel.org Cc: Jani Nikula , Daniel Vetter , Peter Robinson , =?UTF-8?q?Michel=20D=C3=A4nzer?= , dri-devel@lists.freedesktop.org, Thomas Zimmermann , Pekka Paalanen , Javier Martinez Canillas Subject: [PATCH v5 5/6] Documentation/admin-guide: Document nomodeset kernel parameter Date: Fri, 12 Nov 2021 14:32:29 +0100 Message-Id: <20211112133230.1595307-6-javierm@redhat.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211112133230.1595307-1-javierm@redhat.com> References: <20211112133230.1595307-1-javierm@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The nomodeset kernel command line parameter is not documented. Its name is quite vague and is not intuitive what's the behaviour when it is set. Document in kernel-parameters.txt what actually happens when nomodeset is used. That way, users could know if they want to enable this option. Signed-off-by: Javier Martinez Canillas Acked-by: Thomas Zimmermann Acked-by: Jani Nikula Acked-by: Pekka Paalanen --- (no changes since v4) Changes in v4: - Don't mention the simpledrm driver and instead explain in high level terms what the nomodeset option is about. Documentation/admin-guide/kernel-parameters.txt | 7 +++++++ 1 file changed, 7 insertions(+) diff --git Documentation/admin-guide/kernel-parameters.txt Documentation/admin-guide/kernel-parameters.txt index 91ba391f9b32..f6434aff943d 100644 --- Documentation/admin-guide/kernel-parameters.txt +++ Documentation/admin-guide/kernel-parameters.txt @@ -3521,6 +3521,13 @@ shutdown the other cpus. Instead use the REBOOT_VECTOR irq. + nomodeset Disable kernel modesetting. DRM drivers will not perform + display-mode changes or accelerated rendering. Only the + system framebuffer will be available for use if this was + set-up by the firmware or boot loader. + + Useful as fallback, or for testing and debugging. + nomodule Disable module load nopat [X86] Disable PAT (page attribute table extension of -- 2.33.1