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 12DC2C433F5 for ; Mon, 13 Dec 2021 11:22:25 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0BF0A89C25; Mon, 13 Dec 2021 11:22:24 +0000 (UTC) Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by gabe.freedesktop.org (Postfix) with ESMTPS id EF07C89C25 for ; Mon, 13 Dec 2021 11:22:22 +0000 (UTC) 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 sin.source.kernel.org (Postfix) with ESMTPS id B7E07CE100F for ; Mon, 13 Dec 2021 11:22:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id CD553C34609 for ; Mon, 13 Dec 2021 11:22:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639394535; bh=zRlNGBWqR+psqM8LvgxlM/4+1xHaXuLFPYAaVJTA4Zg=; h=From:To:Subject:Date:In-Reply-To:References:From; b=pVE4JxeveKpx1jMcD2z/TDqmTiU52O+oY1zIywS4S0BuNMohJgJAoQP8LDwJjNxwL 9N23h7YIMMaDcT+EOzeyMpOp1WFWFQf6Wb+QInz5SKlUmGs9DiR5Gb/41mQzRYEh+p DBSmdZFgCeOEJTlmD7TM5n3mOKlHO2n3PEt8dBJ9fR7kDafyQfjVvY1w3xkR5OHHnn FQeqkksvKjH8VjoxLKSC3UqRr/T+3VHvdTrCkXoPhPr69MPjTM1vqfGWqEwsVL4u0w aj8YiwClk1rSymqSHpEL2pcIl16N4FbFuwC7QdrAQbrc6Sl1VdyRTqqUQoMshlaYcD bj91uafe53HNg== Received: by pdx-korg-bugzilla-2.web.codeaurora.org (Postfix, from userid 48) id B47C361104; Mon, 13 Dec 2021 11:22:15 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: dri-devel@lists.freedesktop.org Subject: [Bug 211807] [drm:drm_dp_mst_dpcd_read] *ERROR* mstb 000000004e6288dd port 3: DPCD read on addr 0x60 for 1 bytes NAKed Date: Mon, 13 Dec 2021 11:22:15 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed 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: low X-Bugzilla-Who: kernelorg@iopsthecloud.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: cc Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" https://bugzilla.kernel.org/show_bug.cgi?id=3D211807 Renaud R. (kernelorg@iopsthecloud.com) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kernelorg@iopsthecloud.com --- Comment #18 from Renaud R. (kernelorg@iopsthecloud.com) --- My setup: * Latitude E5570 via dock DisplayPort * Kernel: https://bugzilla.kernel.org I randomly have blackscreen and I see in my logs (dmesg): * i915 0000:00:02.0: [drm] *ERROR* mstb 00000000adcef9b1 port 1: DPCD read = on addr 0x4b0 for 1 bytes NAKed * [38971.851918] i915 0000:00:02.0: [drm] *ERROR* mstb 00000000adcef9b1 por= t 1: DPCD read on addr 0x4b0 for 1 bytes NAKed My laptop was reinstall from and old ubuntu 18.04 to 20.04. I can't remember the kernel used in Unbuntu 18.04 but I didn't have this issue. --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=