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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5BF91C433F5 for ; Mon, 8 Nov 2021 14:07:21 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2B930610E9 for ; Mon, 8 Nov 2021 14:07:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2B930610E9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 81B596E0B7; Mon, 8 Nov 2021 14:07:14 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id D1DEF6E0AB for ; Mon, 8 Nov 2021 14:07:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1636380431; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=VOreeT9xy7J8ItI94NHKifuwS46AUpOFOueH2yffi6I=; b=KKVNeWo5ig2LBJSGCBB3DJLQARzu4wndpl916olDH2ZNSciFJJh51r7LcDyb3WqH/aamfi 4u6ywGXLdTyb4h9lsejufWeTGVzPXcZswcduC7TBhViaL9awn0EuN2It6Z6ECK+lpWK+b5 PdvwMDY37XoRkB1j/8jI/AIi/ONCV3Q= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-384-2-TqsR_wOl-T79gNPWATyg-1; Mon, 08 Nov 2021 09:07:09 -0500 X-MC-Unique: 2-TqsR_wOl-T79gNPWATyg-1 Received: by mail-wm1-f69.google.com with SMTP id r6-20020a1c4406000000b0033119c22fdbso6259800wma.4 for ; Mon, 08 Nov 2021 06:07:09 -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=VOreeT9xy7J8ItI94NHKifuwS46AUpOFOueH2yffi6I=; b=viKmqT2wvwrZB4qCTmCHh59ISoBMyocncbQE+rhqJF8put1EG0ZXwgXIGLFUqSDZ5H KU6iFQayH919Kq7PwuqSXiufTnXb2JP+53kxTE/Rq9Q4ySyh5+oIbvEIjuXTBsRRwYa4 RdRZRFm5JSOYCItS6EeI2YCANjcfQ80PRgXH3vRF1vB1ZZaST4G+BDnD6nJfQNKW5NES P0w0cOuhFIqVvyeij7k5CLvjlj3ceYcUvczxuPPLVfLiQy1gw6Rh/nHl0XP2voZ4MqPB ZhveiwyMEHlWvvCK3gYakIjSeEUIRsao44riEiFsxsbtrnS9se73rHGUxHM9CbBngB1Y F1jg== X-Gm-Message-State: AOAM531htTw9q5EY3OiYuIXd7/EzcKw/c2ZuBiB6Xt7jwubJ5cDkY0Uf QE+MMKxWkUHKjxd+nizLwPRC1T20HAqKG+bmgxRxEKfEVu1Bcf/Z8v5UoemgsozCTeFyBk6Jm8J wRXDyiU4tugEeM16ux9m50sFmU3Dr X-Received: by 2002:a5d:51cf:: with SMTP id n15mr80152wrv.106.1636380428653; Mon, 08 Nov 2021 06:07:08 -0800 (PST) X-Google-Smtp-Source: ABdhPJxsYYuejGw7CybgaCxd/E1fUntxtMWk95iWPCbVv910JhxO1p9TBwfd54lnbUNLk9ILcI1Iiw== X-Received: by 2002:a5d:51cf:: with SMTP id n15mr80114wrv.106.1636380428489; Mon, 08 Nov 2021 06:07:08 -0800 (PST) Received: from minerva.home ([92.176.231.106]) by smtp.gmail.com with ESMTPSA id m14sm10081696wrp.28.2021.11.08.06.07.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Nov 2021 06:07:08 -0800 (PST) From: Javier Martinez Canillas To: linux-kernel@vger.kernel.org Subject: [PATCH v4 5/6] Documentation/admin-guide: Document nomodeset kernel parameter Date: Mon, 8 Nov 2021 15:06:47 +0100 Message-Id: <20211108140648.795268-6-javierm@redhat.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211108140648.795268-1-javierm@redhat.com> References: <20211108140648.795268-1-javierm@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=javierm@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pekka Paalanen , Jani Nikula , Daniel Vetter , =?UTF-8?q?Michel=20D=C3=A4nzer?= , Javier Martinez Canillas , dri-devel@lists.freedesktop.org, Peter Robinson , Thomas Zimmermann Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 --- 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