From: bugzilla-daemon@kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 221740] New: ucsi_acpi PPM init failed (-ETIMEDOUT) on ThinkPad E14 Gen 7 (AMD) — blocks USB-C dock enumeration
Date: Thu, 09 Jul 2026 22:20:45 +0000 [thread overview]
Message-ID: <bug-221740-208809@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=221740
Bug ID: 221740
Summary: ucsi_acpi PPM init failed (-ETIMEDOUT) on ThinkPad E14
Gen 7 (AMD) — blocks USB-C dock enumeration
Product: Drivers
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: blocking
Priority: P3
Component: USB
Assignee: drivers_usb@kernel-bugs.kernel.org
Reporter: shofiqtest@gmail.com
Regression: No
Description, include:
journalctl line: ucsi_acpi USBC000:00: error -ETIMEDOUT: PPM init failed
usb_power_delivery_revision: 0.0 (confirms PD negotiation never completes)
DMI: LENOVO 21T0CTO1WW, BIOS R2ZET34W (1.23), model ThinkPad E14 Gen 7
Kernels tested and both affected: 6.19.10-300.fc44 and 7.1.3-200.fc44
Note it works correctly on Windows with the same hardware/dock/cable
Attach the relevant dmesg enumeration failure log (the "device descriptor
read/64, error -71" sequence)
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