From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 C5E092F7475 for ; Fri, 30 Jan 2026 15:09:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769785764; cv=none; b=oMeS+XfF+5AzsafT4gkUrkzsssqbD0VpLSr36EZBpTdaWKDyrJnQaSvJiicbwHOEr53A5jcP39sD8nOYx2ohOrBRCkLbA/0srSXVgXj7TBUuzZcCF4yqBJ9zL31M+NADHnad0Yp1boQpRz5r40saHeo3cOqfbKoxOEvj9eubhbM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769785764; c=relaxed/simple; bh=//5CjfyZsMbMpKsqMCkFPUOWNYjHkWuXAoQqBUzZTGw=; h=From:To:Subject:Date:Message-ID:Content-Type:MIME-Version; b=NKdKFMFa1uZBbjX32/bLU9waYhvRMOo7ie6uUBfnjc8Ie5ZXIZqYaoF3+jsLbqjE285iWBH2hHQUe2IIoOGVCmEDB8ttwu7rGX5ejM+oNFEsrW98LPjYhTs6dPrG2yZbHiQlB+RlLAga7R0MktfCn7SMwGEaQSdkWOGp6nMjiLk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Tcl7HrBB; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Tcl7HrBB" Received: by smtp.kernel.org (Postfix) with ESMTPS id 5EBA0C4CEF7 for ; Fri, 30 Jan 2026 15:09:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769785764; bh=//5CjfyZsMbMpKsqMCkFPUOWNYjHkWuXAoQqBUzZTGw=; h=From:To:Subject:Date:From; b=Tcl7HrBBuZu0Zsj7qtogukaqeXxuW1e7LilqoJaM9/Vn8qoO2prN3/wz5rVF9DtjZ TQOOCc8l/0OslTw2qHwkNXDVvQQjHYaR7sQP5aUfKkSo+orwXFDKr/lqFviDEe8ITJ 0UNf0r1kFBxOdBH0G96HeXwCKaF7PRT9a8hRer19j1lKdVUH3PslGO6Apoc6EzfvsZ NXVe48hZ686iPJvtBUzZW3B+YKCndwlP81G8QtnJpQNodtgyDN+KbnMKtshAmvgWVs rBXqzubQrmEcOhAqx630E46NH7R107LzrzPknCN/BpixbKjIOTDOUPJL+YUby8v83j YoojRc6dmx7LA== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 4CAE0C41613; Fri, 30 Jan 2026 15:09:24 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221022] New: [REGRESSION] Kernel panic in ucsi_reset_ppm on 6.1.0-42 after HP USB-C Dock G5 firmware update Date: Fri, 30 Jan 2026 15:09:24 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: low X-Bugzilla-Who: stamdar@gmail.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cf_regression attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221022 Bug ID: 221022 Summary: [REGRESSION] Kernel panic in ucsi_reset_ppm on 6.1.0-42 after HP USB-C Dock G5 firmware update Product: Drivers Version: 2.5 Hardware: Intel OS: Linux Status: NEW Severity: low Priority: P3 Component: USB Assignee: drivers_usb@kernel-bugs.kernel.org Reporter: stamdar@gmail.com Regression: No Created attachment 309280 --> https://bugzilla.kernel.org/attachment.cgi?id=3D309280&action=3Dedit dmesg I'm experiencing a kernel panic during boot on kernel 6.1.0-42-amd64 that d= oes not occur on 6.1.0-35-amd64. The issue appeared immediately after updating = the HP USB-C Dock G5 firmware from 1.0.18.0 to 1.0.24.0 via fwupd. ## System Information - **Hardware**: ASUS Zephyrus M GU502GV (Intel Core i7-9750H, RTX 2060 Mobi= le) - **Distribution**: Debian 12 (Bookworm) - **Working Kernel**: 6.1.0-35-amd64 (6.1.137-1) - **Broken Kernel**: 6.1.0-42-amd64 (6.1.159-1) - **Dock**: HP USB-C Dock G5 (firmware 1.0.24.0) ## Problem Description After updating the dock firmware, kernel 6.1.0-42 hangs during boot at the = UCSI driver initialization. The system becomes completely unresponsive and never reaches the login screen. Kernel 6.1.0-35 boots successfully with the same firmware. ## Error Messages **Kernel 6.1.0-42** (boot hangs after this): ``` WARNING: CPU: 5 PID: 107 at drivers/usb/typec/ucsi/ucsi.c:918 ucsi_reset_ppm+0x210/0x220 [typec_ucsi] ucsi_acpi USBC000:00: con1: failed to register partner alt modes (-70) ``` **Kernel 6.1.0-35** (boots successfully with warning): ``` WARNING: CPU: 10 PID: 117 at drivers/usb/typec/ucsi/ucsi.c:917 ucsi_reset_ppm+0x210/0x220 [typec_ucsi] ucsi_acpi USBC000:00: con1: failed to register partner alt modes (-70) typec port0: bound usb1-port4 (ops connector_ops [usbcore]) typec port0: bound usb2-port1 (ops connector_ops [usbcore]) [boot continues successfully] ``` The same UCSI error occurs in both kernels, but 6.1.0-42 treats it as fatal while 6.1.0-35 logs the warning and continues. ## Reproduction 1. Update HP USB-C Dock G5 firmware to 1.0.24.0 via fwupd 2. Boot system with dock connected 3. System hangs at UCSI initialization on 6.1.0-42 4. Boot with kernel 6.1.0-35 - system boots normally ## Additional Information **UCSI driver status on working kernel (6.1.0-35):** ``` $ lsmod | grep ucsi ucsi_acpi 16384 0 typec_ucsi 53248 1 ucsi_acpi roles 20480 1 typec_ucsi typec 94208 1 typec_ucsi ``` **USB-C port status:** ``` $ cat /sys/class/typec/port0/data_role [host] device $ cat /sys/class/typec/port0/power_role source [sink] $ cat /sys/class/typec/port0/supported_accessory_modes none ``` **Dock detection (working kernel):** ``` $ lsusb | grep HP Bus 002 Device 004: ID 03f0:066b HP, Inc HP USB-C Dock G5 Bus 001 Device 009: ID 03f0:046b HP, Inc HP USB-C Dock G5 Bus 001 Device 007: ID 03f0:056b HP, Inc USB Audio Bus 001 Device 006: ID 03f0:036b HP, Inc HP USB-C Dock G5 ``` ## Expected Behavior Kernel 6.1.0-42 should handle the UCSI error the same way as 6.1.0-35 - log= the warning and continue boot rather than hanging. ## Workaround Booting kernel 6.1.0-35 works perfectly. All dock functionality (USB device= s, Ethernet) works correctly, though DisplayPort Alt Mode fails to initialize = on both kernels. ## Attachments I can provide: - Full dmesg output from both kernels - Complete /sys/class/typec/ directory contents - Detailed lsusb -v output for the dock - Kernel config differences between versions Let me know if you need any additional information. Thanks --=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.=