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Mon, 3 Nov 2025 12:08:14 +0000 Date: Mon, 3 Nov 2025 14:08:08 +0200 From: Imre Deak To: Frederik Schwan CC: Mika Westerberg , , Andreas Noever , Michael Jamet , Mika Westerberg , Yehezkel Bernat Subject: Re: TB 5 Dock DP-Out non-functional Message-ID: Reply-To: References: <20251103055659.GD2912318@black.igk.intel.com> <20251103102639.GE2912318@black.igk.intel.com> <20251103112648.GI2912318@black.igk.intel.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20251103112648.GI2912318@black.igk.intel.com> X-ClientProxiedBy: DU2PR04CA0024.eurprd04.prod.outlook.com (2603:10a6:10:3b::29) To SJ0PR11MB4845.namprd11.prod.outlook.com (2603:10b6:a03:2d1::10) Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ0PR11MB4845:EE_|SJ0PR11MB4991:EE_ X-MS-Office365-Filtering-Correlation-Id: dd614fd1-7f34-42bc-bcae-08de1ad1aa0d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|10070799003; 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You > > > need to build the tbtools binaries though. > > > > I do package tbtools for Arch so these are available. > > > > tblist gives me: > > Domain 0 Route 0: 8087:7eb2 Intel Gen14 > > Domain 1 Route 0: 17ef:a583 Lenovo ThinkPad P1 Gen8 / T1g Gen8 > > Domain 1 Route 1: 0108:234d Lenovo ThinkPad Thunderbolt 5 Smart Dock 7500 - 40BA > > Okay this has discrete Barlow Ridge TB5 host router. > > > tbadapters --domain 1 --route 1: > > 1: Lane 0 (upstream) CL0 > > 2: Lane 1 CL0 > > 3: Lane 0 CLd > > 4: Lane 1 CLd > > 5: Lane 0 CLd > > 6: Lane 1 CLd > > 7: Lane 0 CLd > > 8: Lane 1 CLd > > 9: PCIe Up L1 > > 10: PCIe Down Disabled > > 11: DisplayPort OUT Disabled > > 12: DisplayPort OUT Enabled > > And this confirms that the DP tunnel is up. > > That tb-bandwidth.sh script should work too (or tbtunnels -d1 -vv). > > Anyways, from TB perspective this looks okay. Not sure about graphics. Imre > do you see anything? Could you please try booting with 'log_buf_len=20M drm.debug=0x10e i915.enable_panel_replay=0', provide a dmesg log after booting and connecting the same dock+monitor? If the above works around the issue, could you please try if applying the 7 patches of the [1] patchset fixes the issue (booting with those patches applied and without the i915.panel_panel_replay=0 kernel parameter)? These same patches rebased on v6.17.7 are also available at [2] or in the latest v6.18.0-rc3 based drm-tip tree at [3]. Thanks, Imre [1] https://lore.kernel.org/all/20251015161934.262108-1-imre.deak@intel.com [2] https://github.com/ideak/linux/commits/fix-mst-dsc-panel-replay [3] https://gitlab.freedesktop.org/drm/tip/-/commits/drm-tip