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 D36E238E5C5 for ; Fri, 17 Apr 2026 13:08:52 +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=1776431332; cv=none; b=C1BaJzHZsYM+qthw4Ub2JOmN+99FbNRvaq3MH7VQXwkZM3Yf37BySZID4iHlosgpvyTZWMU39qr6b7SUEmnUf1Axe9LbMOB9AUFAb6ess7yMtaP5/U1tzGlKURkfesKb7V2nUoitUkiWM6GM5+Y6nERZoaZYNjyLK0gRrF8XYyk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776431332; c=relaxed/simple; bh=kcEKA/q1YysToLjqFOPaavPA7E8ALgSowIncvoBN1gY=; h=From:To:Subject:Date:Message-ID:Content-Type:MIME-Version; b=IB288xJl1hHRUZ00HrJKD0o3VjGBlwJ31uj1dR5rCzmvKdUGSK7PUEK8hP6GupDI3aXpnGDvjEZijn/74heIK5Ds7Ho5ruFTeDlzcJfjBmRCtgjEfeF3mXby9NATmlSHb1fJl4/UfqHa7RVAzoyDuZAldZRguN9xR7dj/r0dSdI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=j1x4c8nO; 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="j1x4c8nO" Received: by smtp.kernel.org (Postfix) with ESMTPS id 71D04C19425 for ; Fri, 17 Apr 2026 13:08:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776431332; bh=kcEKA/q1YysToLjqFOPaavPA7E8ALgSowIncvoBN1gY=; h=From:To:Subject:Date:From; b=j1x4c8nODg9mtFjFYNWIm8XNsRGcRmpcUru2MdbF2FBlM6+2XjCTv3B0eecaBsF2L JDDfia1TIJ5mbg9cSqCgJPdKujhSpLpLLN9/2rlDZKRfnRxzV6WRQrIU2Y1VfmVmBB dlox2iJRdvBEs3bDtMlRCdJz0tHiuWa3Q0Ic4JxasoqauqwmW9XtZqXen8RhayMtN6 ezlHPXMZN/wcdqs8g5wH87+u4c8SeY8b8C0jk0C9UmqTIefO0q+XWCbOwxLBH8+kQr MWNeCH4go6ivwLZD9abPlofqbvDKn2JwR01MLCfHPwTfS6h5s1Rp8bgKeVSgso1bbN 95J3xP6BlH0VA== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 65330C433E1; Fri, 17 Apr 2026 13:08:52 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221379] New: xhci_hcd: USB ports intermittently disabled with "EMI?" on Intel Alder Lake-S PCH (Z690) with Genesys Logic hubs Date: Fri, 17 Apr 2026 13:08:52 +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: normal X-Bugzilla-Who: ingo@da-is.de 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 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=3D221379 Bug ID: 221379 Summary: xhci_hcd: USB ports intermittently disabled with "EMI?" on Intel Alder Lake-S PCH (Z690) with Genesys Logic hubs Product: Drivers Version: 2.5 Hardware: Intel OS: Linux Status: NEW Severity: normal Priority: P3 Component: USB Assignee: drivers_usb@kernel-bugs.kernel.org Reporter: ingo@da-is.de Regression: No USB devices connected to the Intel Alder Lake-S PCH xHCI controller intermittently disconnect with the kernel message usb X-Y-portZ: disabled by hub (EMI?), re-enabling... followed by device reconnect. The issue occurs a= fter periods of inactivity (approximately 5 minutes) and affects multiple USB devices regardless of which physical port is used. The problem is specific to Linux =E2=80=93 the same hardware configuration = works without any issues under Windows 11, ruling out a hardware defect. Kernel version: 6.19.12-200.fc43.x86_64 Distribution: Fedora 43 Hardware: Mainboard: Gigabyte Technology Co., Ltd. Z690 UD DDR4 CPU: Intel Core i9-14900KF USB Controller: Intel Corporation Alder Lake-S PCH USB 3.2 Gen 2x2 xHCI Controller (rev 11), PCI ID 0000:00:14.0 xHCI quirks: 0x0000000200009810 Affected devices (connected via Genesys Logic hubs): Thrustmaster TWCS Throttle (044f:b687) Logitech PRO X RAPID keyboard (046d:c35b) Elgato Stream Deck MK.2 (0fd9:0080) Not affected: Devices connected to Renesas uPD720201 USB 3.0 Host Controller (08:00.0) work without any issues. Steps to reproduce: Connect USB devices via Genesys Logic hubs (05e3:0608 or 05e3:0610) to the Intel Alder Lake-S PCH xHCI controller Leave system idle for approximately 5 minutes Return to system =E2=80=93 USB devices disconnect and reconnect Expected behavior: USB devices remain stable during and after idle periods. Actual behavior: usb X-Y-portZ: disabled by hub (EMI?), re-enabling... usb X-Y.Z: USB disconnect, device number N usb X-Y.Z: new full-speed USB device number M using xhci_hcd Workaround: Moving affected devices to a Renesas uPD720201 PCIe USB control= ler resolves the issue completely. Additional notes: Problem occurs with both onboard Genesys Logic hubs and external Genesys Lo= gic hubs Problem also occurred with a separate PCIe USB card (different controller) = when Genesys Logic hubs were involved All software-based fixes attempted (USB autosuspend disabled, PCI power management disabled, C-states checked) had no effect Windows 11 on the same hardware shows no USB instability --=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.=