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=-5.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 01BB9C07E95 for ; Tue, 20 Jul 2021 12:19:25 +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 B5EED6113B for ; Tue, 20 Jul 2021 12:19:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B5EED6113B 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 256D789AEA; Tue, 20 Jul 2021 12:19:24 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id E070789AEA for ; Tue, 20 Jul 2021 12:19:22 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPS id 4C88961165 for ; Tue, 20 Jul 2021 12:19:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1626783562; bh=95v+8uYiVb0r7YCekmShU9E9ej7CcwdVXqWdYu47Qts=; h=From:To:Subject:Date:In-Reply-To:References:From; b=DFd6I674Q/OmbsHqfG7bjgR17BuqGbSL3oCfS4PABSdci487l5hk5E95HbU9eCs32 yHnrmA8GpP3SfqwJXf+9tidZCV47pTTJ3lvARafU3UBu4UfClpSSuaOqcAxkZXTGmE HjjhyBTcbe289hW7qU250elulGYRFVeqV8o51VFDoudYUKZY/E/KL9JMHLsAEI6GRW XvtQhQBLaodnzQudQt+4c25y6Wo2Btc/1SoMxlI6VIlbejMCRVAcKlJvmm8BdofA1I YNj4LB1c/ZtX2qTUhOn1i3G2Jsdj5+cDbfAtBBK5p2TflXswrl8UGcVPb4dIMgYUyg naHoaJBKtySog== 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: Tue, 20 Jul 2021 12:19:21 +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: pavol.harar@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: 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 pavol.harar@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pavol.harar@gmail.com --- Comment #2 from pavol.harar@gmail.com --- I am experiencing the aforementioned error as well. [drm:drm_dp_mst_dpcd_read [drm_kms_helper]] *ERROR* mstb 00000000f00db6df p= ort 0: DPCD read on addr 0x4b0 for 1 bytes NAKed I have problems connecting my ThinkPad X1 Carbon 7gen to two external DP monitors via a ThinkPad USB-C gen2 docking station. Linux is not officially supported for this dock unfortunately. The problem is that the monitors wor= k, but seemingly randomly they stop working, either I try to go to Ubuntu sett= ings or try to open some program with a keyboard shortcut. The monitors flicker, then die and I have to reboot. Sometimes just reconnecting the cable works,= but usually not. Sometimes when I connect my phone to the dock the monitors sta= rt working again, but most often not. There is a lot of people having these problems but I have not found any solution. In dmseg only this error appear= s. I am to the best of my knowledge up to date with everything, kernel, bios, firmware etc. --=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.=