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,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_2 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 47EBCC4338F for ; Mon, 2 Aug 2021 18:36:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 14274603E9 for ; Mon, 2 Aug 2021 18:36:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229951AbhHBSg1 (ORCPT ); Mon, 2 Aug 2021 14:36:27 -0400 Received: from omta016.useast.a.cloudfilter.net ([34.195.253.207]:54303 "EHLO omta016.useast.a.cloudfilter.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229537AbhHBSg0 (ORCPT ); Mon, 2 Aug 2021 14:36:26 -0400 X-Greylist: delayed 429 seconds by postgrey-1.27 at vger.kernel.org; Mon, 02 Aug 2021 14:36:26 EDT Received: from cxr.smtp.a.cloudfilter.net ([10.0.17.147]) by cmsmtp with ESMTP id AbZlmx2F9MRfUAcgUmM0Dp; Mon, 02 Aug 2021 18:29:06 +0000 Received: from ws ([24.255.45.226]) by cmsmtp with ESMTPSA id AcgSmMZ2YUuJWAcgTmiQl4; Mon, 02 Aug 2021 18:29:06 +0000 Authentication-Results: cox.net; auth=pass (LOGIN) smtp.auth=j.duncan@cox.net X-Authority-Analysis: v=2.4 cv=cO0lDnSN c=1 sm=1 tr=0 ts=61083972 a=rsvNbDP3XdDalhZof1p64w==:117 a=rsvNbDP3XdDalhZof1p64w==:17 a=kj9zAlcOel0A:10 a=pGLkceISAAAA:8 a=G4gGlADBVhTulWZLwAIA:9 a=CjuIK1q_8ugA:10 Date: Mon, 2 Aug 2021 11:29:04 -0700 From: Duncan To: mikpelinux@gmail.com Cc: daniel.vetter@ffwll.ch, dri-devel@lists.freedesktop.org, jason@jlekstrand.net, linux-kernel@vger.kernel.org Subject: Re: [BISECTED] 5.14.0-rc4 broke drm/ttm when !CONFIG_DEBUG_FS Message-ID: <20210802112904.110028a4@ws> X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.29; x86_64-pc-linux-gnu) In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-CMAE-Envelope: MS4xfKOHvzWWmenb48sQIRdupwA5msxYl4omOjmeMvA8D0vxAtj2OhZKoOJ8REd3ujvkJ3Cfxi465To0ng2WLaRfFGIk0WfOwOX4rSvuYheg+HSiRRzqQZHk UVuQhEW9RskCZvTiP8kMocVMUfBik45ijgE/gSKQl8/dqKZuwZv+MyXfXSMEmrckcMhU8qZTBBAsCrncJQMmB24/dllnTa2RzE4zBpZ9xSB/8kj6DC0vReiR mbmDc82G/XSvPRkqMc48NviC99EXTmiO++noA77BUVhEoIW+Si6428uV6bCBe+TJsspDujbv88H3hgE32VFk19FbIkDUHoKS6heKF8c4kU4= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [Not subscribed so please CC me. Manual quoting after using lore's in-reply-to functionality. First time doing that so hope I got it right.] Mikael Pettersson wrote... > Booting 5.14.0-rc4 on my box with Radeon graphics breaks with > > [drm:radeon_ttm_init [radeon]] *ERROR* failed initializing buffer > object driver(-19). > radeon 0000:01:00.0: Fatal error during GPU init Seeing this here too. amdgpu on polaris-11, on an old amd-fx6100 system. > after which the screen goes black for the rest of kernel boot > and early user-space init. *NOT* seeing that. However, I have boot messages turned on by default and I see them as usual, only it stays in vga-console mode instead of switching to framebuffer after early-boot. I'm guessing MP has a high-res boot-splash which doesn't work in vga mode, thus the black-screen until the login shows up. > Once the console login shows up the screen is in some legacy low-res > mode and Xorg can't be started. > > A git bisect between v5.14-rc3 (good) and v5.14-rc4 (bad) identified > > # first bad commit: [69de4421bb4c103ef42a32bafc596e23918c106f] > drm/ttm: Initialize debugfs from ttm_global_init() > > Reverting that from 5.14.0-rc4 gives me a working kernel again. > > Note that I have > # CONFIG_DEBUG_FS is not set That all matches here, including the unset CONFIG_DEBUG_FS and confirming the revert on 5.14.0-rc4 works. -- Duncan - HTML messages treated as spam "They that can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety." Benjamin Franklin