From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 833D3330B38; Thu, 18 Dec 2025 07:21:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766042491; cv=none; b=AQZVFy7xSc5BJKpDiBckjQFWVdv6QF7t47eW7v/JCBOBnaGDJqG+DnEsWMXifeLt0qPta2ldJZehnV7Dm0TnzRVi3RfbXLtE3rlyBYmopdmyatO22ju3qqeTWu2tcQzJFK2xszDzmIrFnqC70aHwv2e1DC9yrxv72SeiyKSorOU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766042491; c=relaxed/simple; bh=NkEl97TzRICZPXVyX+EixiT/Gu6lVI7uY4VaNbEjNlw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=JqZJ9BIl1n+Qj2OjoVQdmTgWfQKmHEPoS7bZXnKJQqekRk5/eji2nsYEMaU14+Gla/9YNbFwzmeJRNpD3KX9mImnXI7dmjDMesi374quh3QlcLHj6iPDUL/tGq5r3iBWbUdeKeL7UNDd7HEJVNTy9Vy7gqxFgnmCItVlpXx85qM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=hcZMTk0P; arc=none smtp.client-ip=198.175.65.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="hcZMTk0P" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1766042490; x=1797578490; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=NkEl97TzRICZPXVyX+EixiT/Gu6lVI7uY4VaNbEjNlw=; b=hcZMTk0PsW+yKlf5lhso1fbzO8M9JpoMGUNKnjZF+XMD5WaR6lvRVy+D bpVW/bYpzMBDIo3Zquo7+6UA0cOS9ga6pW4tGVsh2eqC8nU7+ypYjlbK6 WV0W1O+pzUeoEdg8Ptt0wIvalOM6MgOTWSW5d32/YwjuC3Qdb740QbOJ6 U9T5w02QF+hq59XHaT5fRmn+28QaKihtLPgEHNdqmK2GRu8/RB46IXypM +Qt9UtSvAuSR1wQkFqek7824EW47tXon42a5XFWkC33YmGawqUfMwErf0 AbrQANYCbBwKNlO51kSI58KQxyhyDAp2P3Gd9K/Q3ONLHUa8tntwl8Clh w==; X-CSE-ConnectionGUID: pPBC7Pp6T9qFNggXk4luPg== X-CSE-MsgGUID: edLLxdSSQeyX7N6ivCjk0Q== X-IronPort-AV: E=McAfee;i="6800,10657,11645"; a="68144928" X-IronPort-AV: E=Sophos;i="6.21,156,1763452800"; d="scan'208";a="68144928" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Dec 2025 23:21:29 -0800 X-CSE-ConnectionGUID: RW5GlOssTgyxpkiJlNfUwQ== X-CSE-MsgGUID: Zyk00UfJQhimmoxHGoJqew== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,156,1763452800"; d="scan'208";a="229208076" Received: from black.igk.intel.com ([10.91.253.5]) by orviesa002.jf.intel.com with ESMTP; 17 Dec 2025 23:21:27 -0800 Received: by black.igk.intel.com (Postfix, from userid 1001) id C796D8E; Thu, 18 Dec 2025 08:21:25 +0100 (CET) Date: Thu, 18 Dec 2025 08:21:25 +0100 From: Mika Westerberg To: AceLan Kao Cc: Mario Limonciello , Andreas Noever , Mika Westerberg , Yehezkel Bernat , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Sanath.S@amd.com, "Lin, Wayne" Subject: Re: [PATCH] [RFC] thunderbolt: Add delay for Dell U2725QE link width Message-ID: <20251218072125.GU2275908@black.igk.intel.com> References: <20251210074133.GE2275908@black.igk.intel.com> <4634177b-8ed1-4d65-9f3c-754d8c1eb828@amd.com> <20251212123941.GK2275908@black.igk.intel.com> <484ff606-ec10-477c-acfe-d4d781e2873d@amd.com> <20251217125507.GR2275908@black.igk.intel.com> <5d7f2661-f02b-4985-b438-196b48c10237@amd.com> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Hi, On Thu, Dec 18, 2025 at 09:38:13AM +0800, AceLan Kao wrote: > > > + /* > > > + * Scan for downstream retimers. We only scan them after the > > > + * router has been enumerated to avoid issues with certain > > > + * Pluggable devices that expect the host to enumerate them > > > + * within certain timeout. > > > + */ > > > + tb_retimer_scan(port, true); > Hi Mika, > > This doesn't work. > https://people.canonical.com/~acelan/bugs/tbt_call_trace/intel/merged_6.18.0-d358e5254674+.patched1.out Okay thanks for trying. I noticed that there is also USB 2.x disconnect: [ 4.470610] usb 3-2: New USB device found, idVendor=1d5c, idProduct=5801, bcdDevice= 1.01 [ 4.470618] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 4.470620] usb 3-2: Product: USB2.0 Hub [ 4.470622] usb 3-2: Manufacturer: Fresco Logic, Inc. ... [ 104.699872] tb_tx Read Request Domain 0 Route 303 Adapter 0 0x00/---- 0x00000000 0b00000000 00000000 00000000 00000000 .... Route String High 0x01/---- 0x00000303 0b00000000 00000000 00000011 00000011 .... Route String Low 0x02/---- 0x0400202c 0b00000100 00000000 00100000 00101100 ..., [00:12] 0x2c Address [13:18] 0x1 Read Size [19:24] 0x0 Adapter Num [25:26] 0x2 Configuration Space (CS) → Router Configuration Space [27:28] 0x0 Sequence Number (SN) [ 104.700850] tb_event Hot Plug Event Packet Domain 0 Route 0 Adapter 3 / Lane 0x00/---- 0x80000000 0b10000000 00000000 00000000 00000000 .... Route String High 0x01/---- 0x00000000 0b00000000 00000000 00000000 00000000 .... Route String Low 0x02/---- 0x80000003 0b10000000 00000000 00000000 00000011 .... [00:05] 0x3 Adapter Num [31:31] 0x1 UPG [ 104.700852] [763] thunderbolt 0000:00:0d.2: acking hot unplug event on 0:3 // Here we got the unplug to 0:3. After a while [ 106.844134] usb 3-2: USB disconnect, device number 14 Now since USB 2.x has its own wires in Type-C cable this tells me that there is some real problem with the connection. Have you tried different cables already?