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=-1.0 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 AED6EC4724C for ; Wed, 6 May 2020 07:58:15 +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 83BC720714 for ; Wed, 6 May 2020 07:58:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 83BC720714 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=bugzilla.kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EACD789EA6; Wed, 6 May 2020 07:58:14 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id D0DE289EAC for ; Wed, 6 May 2020 07:58:13 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: dri-devel@lists.freedesktop.org Subject: [Bug 207595] New: [amdgpu] Displayport MST not functional on AMD Stoney Date: Wed, 06 May 2020 07:58:13 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo drivers_video-dri@kernel-bugs.osdl.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: Video(DRI - non Intel) X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: jjo.braun@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 X-Bugzilla-Assigned-To: drivers_video-dri@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version cf_kernel_version rep_platform op_sys cf_tree bug_status bug_severity priority component assigned_to reporter cf_regression attachments.created Message-ID: X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" https://bugzilla.kernel.org/show_bug.cgi?id=207595 Bug ID: 207595 Summary: [amdgpu] Displayport MST not functional on AMD Stoney Product: Drivers Version: 2.5 Kernel Version: 5.4.28, 5.4.36 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: jjo.braun@gmail.com Regression: No Created attachment 288939 --> https://bugzilla.kernel.org/attachment.cgi?id=288939&action=edit lspci output of Lenovo 14w notebook with stoney gpu Hello, I do have some issues running a Lenovo 14w notebook in a multi monitor setup. The displays are connected as followed: [Lenovo 14w]--(USB-C)-->[Dell U2719DC]--(Display Port)-->[Some other display] The second display is not connected directly to the notebook. This display is connected to the monitor output of the Dell display. The Dell display is configured to use MST and this setup was successfully validated with a Windows 10 installation. When I plug the Dell 2719DC with the daisy chained monitor via USB-C to the notebook, the screens are staying black and I get crash of the amdgpu driver in dmesg. Kernel logs (5.4.28 and 5.4.36) are attached. My system is currently based on kernel 5.4.28. But I did checked also the latest kernel version in the 5.4 LTS tree which was 5.4.36. The same error is reproducable under Ubuntu 20.04 which is based on kernel 5.4.0. If MST is disabled in the Dell 2719DC, it works as expected. My intenal notebook screen is expanded with the USB-C connected Dell U2719DC. And the third monitor is in clone mode with the Dell U2719DC. Thank you for reading and kind regards, Johannes Braun -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel