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 69A0BC433F5 for ; Wed, 24 Nov 2021 13:22:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 567BC6E90D; Wed, 24 Nov 2021 13:22:10 +0000 (UTC) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id 96F846E90D for ; Wed, 24 Nov 2021 13:22:08 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPS id 4C25961288 for ; Wed, 24 Nov 2021 13:22:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1637760128; bh=li0JPkoMkVEzYwuBN91+0W2zSpnyu1XrYq7A3Xc8UuI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=NIKD51HY5DiNFOzbKkU0JcNj4joo29wr8BfJ04ygWgm4M0n2Y1NIAlAerxmPlEX+9 mS/u5mJIt+hsP6PhLhpUd/M9TBOIQ4m1ShlJEMnz97kOFBdFH8evcuKOtWEe4jV92g b2hxtv6LfGI1bo+z7HTr8UPmZ+90uxR8nl+beuQ20LY5+ShO5hHcBGVJX2iGrdixgl bfl7eePYa4G+nRMxfayORxItVm7BumELZLcOCIT79eMhD2pnrjxi7xYJlXmAC7CXG7 Qk9jSz1eS3CYR1RLqIWuzFFEQ/OtHdsPASB47mNQC5bOlCfiKjW4eZhS6+PBKlDZe3 pT37RFO2TFYsw== Received: by pdx-korg-bugzilla-2.web.codeaurora.org (Postfix, from userid 48) id 476F060F37; Wed, 24 Nov 2021 13:22:08 +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: Wed, 24 Nov 2021 13:22:07 +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: mail@chatty.de 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 Chatty (mail@chatty.de) changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mail@chatty.de --- Comment #17 from Chatty (mail@chatty.de) --- My setup: MS Surface Book 2 + AOC U2879G6 via Surface Dock via DisplayPort Tested kernels: 5.10.0 / 5.15.3 / 5.16.0-rc1 When connecting I get random results of: * monitor remains black * monitor exhibits 1080p@60 as max resolution * monitor exhibits 1440p@60 as max resolution * monitor exhibits 2160p@30 as max resolution * monitor exhibits 2160p@30 as max resolution <=3D=3D desired On boot of 5.16.0-rc1 its initialized with: > i915 0000:00:02.0: [drm] Finished loading DMC firmware > i915/kbl_dmc_ver1_04.bin (v1.4) > [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0 In the first case I see following dmesg output (black monitor): > i915 0000:00:02.0: [drm] *ERROR* mstb 0000000009cd3ca6 port 1: DPCD read = on > addr 0x4b0 for 1 bytes NAKed In the last case I see following dmesg output (despite monitor working): > i915 0000:00:02.0: [drm] *ERROR* mstb 00000000f4b4c9f1 port 1: DPCD read = on > addr 0x4b0 for 1 bytes NAKed > i915 0000:00:02.0: [drm] *ERROR* mstb 00000000f4b4c9f1 port 1: DPCD read = on > addr 0x4b0 for 1 bytes NAKed > i915 0000:00:02.0: [drm] *ERROR* mstb 00000000f4b4c9f1 port 1: DPCD read = on > addr 0x4b0 for 1 bytes NAKed > i915 0000:00:02.0: [drm] *ERROR* mstb 00000000f4b4c9f1 port 1: DPCD read = on > addr 0x4b0 for 1 bytes NAKed > i915 0000:00:02.0: [drm] *ERROR* mstb 00000000f4b4c9f1 port 1: DPCD read = on > addr 0x4b0 for 1 bytes NAKed --=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.=