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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B615AC38147 for ; Wed, 18 Jan 2023 21:15:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231156AbjARVPa (ORCPT ); Wed, 18 Jan 2023 16:15:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44202 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231214AbjARVOv (ORCPT ); Wed, 18 Jan 2023 16:14:51 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EC722630A6 for ; Wed, 18 Jan 2023 13:14:27 -0800 (PST) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 85E3061997 for ; Wed, 18 Jan 2023 21:14:27 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B4755C433EF; Wed, 18 Jan 2023 21:14:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1674076466; bh=viBveGu88AsjPiWErhOmDAlRkCq1n+hHkT6lfehusXM=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=P+6bLzgWp6OrhYNUKh0Na3pZPGFySZh1vdknGJs07Sv3v9YQhRQ7UswUPlw4GiBgb JBPUBrig5WTpInKkRFONkP/qc6CodmBitUjFCcDCfQLo1cyUyetD7Kp9k8Qb17wgtf Ev7/LKkPyqO5/wzi0MeavkzZqTdOa0E4pe1t4JLsTsowOZVhq11e7Bs5MHljC8fGUZ 5pplkjlokWREuRzbafSn4/zwL3I5O6s+99jorULvNBLgkMz0VFdVYR6U+Ckav7/c+b 6H+dWMgEuCCuq+a/HE6ZcKBDJFmnXJF5TuENyt50XslCKLYGV7z+x/M33viHH/sh7W AW4QXjPlBy92Q== Date: Wed, 18 Jan 2023 15:14:24 -0600 From: Bjorn Helgaas To: David Airlie , Daniel Vetter Cc: Marcin , linux-pci@vger.kernel.org, dri-devel@lists.freedesktop.org, regressions@lists.linux.dev Subject: Re: [Bug 216950] New: DisplayPort USB-C hub issue Message-ID: <20230118211424.GA259217@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Wed, Jan 18, 2023 at 07:49:38PM +0000, bugzilla-daemon@kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=216950 > Summary: DisplayPort USB-C hub issue > Kernel Version: 6.2.0-rc3 > ... > Created attachment 303624 > --> https://bugzilla.kernel.org/attachment.cgi?id=303624&action=edit > dmidecode + kern.log > > I have HP 845 EliteBook G7 (Ryzen) and before 6.2.0-rc3 installation > there was no issue with my laptop and HP docking station via USB-C. > > This kernel display behaves weirdly. LCD monitor (connected to > docking station via DisplayPort) wakes up only once after reboot. > Second docking connection ends up with blank external screen and > only restart helps. > > Display manager detects extra screen and even newly launched apps > land there. > > I didn't have such issues with original distro kernel > 5.16.15-76051615-generic This report (which looks like a regression between 5.16.15-76051615-generic and 6.2.0-rc3) was raised against PCI, but I don't see PCI issues in the logs. Any DRM ideas? Bjorn