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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 3E191C43334 for ; Thu, 9 Jun 2022 13:08:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 94B6D112E8C; Thu, 9 Jun 2022 13:08:34 +0000 (UTC) Received: from mr3.vodafonemail.de (mr3.vodafonemail.de [145.253.228.163]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7678A112E8C for ; Thu, 9 Jun 2022 13:08:33 +0000 (UTC) Received: from smtp.vodafone.de (unknown [10.0.0.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by mr3.vodafonemail.de (Postfix) with ESMTPS id 4LJktR4S7fz20Rf for ; Thu, 9 Jun 2022 13:08:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arcor.de; s=vfde-mb-mr2-21dec; t=1654780111; bh=KhvKfjg3BUt5QsQHpd1oxS5sJu7LWs+iRxpZlu41zns=; h=Message-ID:Date:User-Agent:Subject:Content-Language:To:References: From:In-Reply-To:Content-Type:From; b=fEq7ZJdrd3EnHzaK8tHYT6vvNrtNldlW3/b0ejBPrcjFPQpNwY3g/I/4qg6IIvXjZ hpqAlxu01PBHdjbXg9ZkejtFL0J5sV34ujKU3Tg+vauvJRlMyFo/OE6cYIgwf4fQhp vylJslkH9PZr8u1WcdXj0BduJoeVFqe7n0UReNg0= Received: from schreibtisch (p2e579e8f.dip0.t-ipconnect.de [46.87.158.143]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by smtp.vodafone.de (Postfix) with ESMTPSA id 4LJktQ5K7Yz9wMx for ; Thu, 9 Jun 2022 13:08:27 +0000 (UTC) Message-ID: Date: Thu, 9 Jun 2022 15:08:27 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: drm/vc4: module dysfunctional on Raspberry Pi 3B as of 5.18.0 Content-Language: en-US To: dri-devel@lists.freedesktop.org References: <75eec8af-66fd-bbaa-9aea-4cdf634bf2c8@arcor.de> <20220608143605.x4arwudst3nqeg7b@houat> From: Peter Mattern In-Reply-To: <20220608143605.x4arwudst3nqeg7b@houat> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-purgate-type: clean X-purgate: clean X-purgate-size: 1596 X-purgate-ID: 155817::1654780110-0000049E-51E070F7/0/0 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" > If I understand you properly, it results in a blank screen if the > monitor is connected, but the system is still responsive? Yes. Similar to (the other) Peter's findings, the system is fully responsive, it's just that the monitor is displaying a black screen. Meanwhile I stumbled upon another detail: when the problem is manifest, the monitor's LED displaying whether a signal is available keeps shining permanently. I does not start flashing as it does when an attached computer is switched off. > If so, it's a very different problem than the link you provided, since > it was occurring when no monitor was connected and resulted in a total > system hang. I didn't follow up things too closely. But I remember very well that I stumbled upon that thread "Linux 5.16.3 breaks headless Raspberry Pi 3 boot, again" while I was facing the exact same problem we're discussing right now. Also, some findings in the Arch Linux ARM forums were similar then [1]. The problem did disappear in 5.16.7 when some offending commit was reverted. > I tested on 5.18 on my 3B and it works well. Could you paste your kernel > configuration and config.txt somewhere? Just done in a Mail which was supposed to respond to Stefan's first one, which went wrong. (As Stefan isn't subscribed his mail was lacking the usual headers like "In-Reply-to". So I started editing by hitting the link on top of [2]. But this didn't work.) [1] https://archlinuxarm.org/forum/viewtopic.php?f=57&t=15842 [2] https://lists.freedesktop.org/archives/dri-devel/2022-June/357819.html