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 alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (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 DCC62C05027 for ; Wed, 1 Feb 2023 22:31:40 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id B06AD820; Wed, 1 Feb 2023 23:30:47 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz B06AD820 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1675290697; bh=zot7qOvxCoMuk3Wa7msvKuV8ZKjBUkCftR+hKbpMvKg=; h=Date:From:To:Subject:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:Cc:From; b=uIQCS5ghZJM4PqsF1XxKdIZSElE/IBhqcQqxr1tb+SZ27eBe3zn1s79yo1Mx+CIjZ gOFj+d4yLagJaOkop+a+IHzQkomVE/9RrsTVp1QecwiXPMy2SpGp1hZVSh3LU35eva XRtpb2rX6F80M+xmM55mwe5H/y13cE+dgQIIxJFU= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 08FC1F8032B; Wed, 1 Feb 2023 23:30:47 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id BA4ACF80423; Wed, 1 Feb 2023 23:30:44 +0100 (CET) Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 9C01DF80246 for ; Wed, 1 Feb 2023 23:30:36 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 9C01DF80246 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=G6BGYj8G Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 375F6B821C8; Wed, 1 Feb 2023 22:30:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9AE91C433D2; Wed, 1 Feb 2023 22:30:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1675290633; bh=zot7qOvxCoMuk3Wa7msvKuV8ZKjBUkCftR+hKbpMvKg=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=G6BGYj8GNN1wSIw5qe4+JxQaJlNBaLF4nV7u7LDHOCEUorpic/7/hdux1jfRK8GLi A06Jui8y/0k9u7PZfSQ/4XKzZHLAtiOB1JqkI779XfcWpCG16HNN0DcPQuNrfxlFmr WNl3b4rzTYeL+opzUO7mcOv4QNbOPwHELFYPCLXUhAMrqrE5HS6jfe2XihaXjeJFiN USV4kfR1Pj3w6nETSKBrEIqrKuHhaDYnVD0zdZ4f/T8nOW5TJxh3M5iXjVRjFapoYR LrnpN1j+KST+snypzKs/4c7W2iD/v8aP4baRDDE6/pOtKwNLta62Bc1WdWrd8NMcpd TgBKkJmvxp3zA== Date: Wed, 1 Feb 2023 16:30:32 -0600 From: Bjorn Helgaas To: Thomas Zimmermann Subject: Re: [REGRESSION] [Bug 216859] New: PCI bridge to bus boot hang at enumeration Message-ID: <20230201223032.GA1904036@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230126121124.GA1258686@bhelgaas> X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , alsa-devel@alsa-project.org, regressions@lists.linux.dev, Antonino Daplas , Takashi Iwai , linux-pci@vger.kernel.org, Helge Deller , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Javier Martinez Canillas , linux-fbdev@vger.kernel.org, Geert Uytterhoeven , "Zeno R.R. Davatz" Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" [+cc Geert] On Thu, Jan 26, 2023 at 06:11:24AM -0600, Bjorn Helgaas wrote: > On Thu, Jan 12, 2023 at 02:08:19PM -0600, Bjorn Helgaas wrote: > > On Wed, Dec 28, 2022 at 06:02:48AM -0600, Bjorn Helgaas wrote: > > > On Wed, Dec 28, 2022 at 08:37:52AM +0000, bugzilla-daemon@kernel.org wrote: > > > > https://bugzilla.kernel.org/show_bug.cgi?id=216859 > > > > > > > Summary: PCI bridge to bus boot hang at enumeration > > > > Kernel Version: 6.1-rc1 > > > > ... > > > > > > > With Kernel 6.1-rc1 the enumeration process stopped working for me, > > > > see attachments. > > > > > > > > The enumeration works fine with Kernel 6.0 and below. > > > > > > > > Same problem still exists with v6.1. and v6.2.-rc1 > > This is a regression between v6.0 and v6.1-rc1. Console output during > boot freezes after nvidiafb deactivates the VGA console. > > It was a lot of work for Zeno, but we finally isolated this console > hang to 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus"). > > The system actually does continue to boot and is accessible via ssh, > but the console appears hung, at least for output. More details in > the bugzilla starting at > https://bugzilla.kernel.org/show_bug.cgi?id=216859#c47 . 145eed48de27 ("fbdev: Remove conflicting devices on PCI bus") doesn't say what the benefit is, or what would break if we reverted it. Does anybody have any clues? It would be nice to resolve this regression before v6.2, which will probably be released 2/12 or 2/19. Bjorn