linux-kernel - Endless loop USB device disconnects and connects after wakeup from s2idle

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <aVQpXiJbuxT9YKFL@frehi.be>
Date: Tue, 30 Dec 2025 20:34:54 +0100
From: Frederik Himpe <frederik@...hi.be>
To: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Endless loop USB device disconnects and connects after wakeup from
 s2idle

On my HP EliteBook 8 G1a 14 with Linux 6.28.2, sometimes when waking up
my system after s2idle, the system triggers and andless loop of
disconnect and connect events for the ELAN:ARM-M4 USB device, which I
guess is the fingerprint reader.

On this system, I also have a second problem with an amd-pmf error
appearing in an enless loop, which I reported here:
https://lore.kernel.org/lkml/aVK0QPrtjyASafJm@frehi.be/T/#u
but I have not yet seen those two problems together, so I have the
feeling these are distinct problems.

Any idea how I could debug this further?

[ 5203.044043] kernel: usb 3-4: reset full-speed USB device number 3 using xhci_hcd
[ 5222.850312] kernel: usb 3-4: reset full-speed USB device number 3 using xhci_hcd
[ 5253.836061] kernel: usb 3-4: USB disconnect, device number 3
[ 5253.960060] kernel: usb 3-4: new full-speed USB device number 5 using xhci_hcd
[ 5254.128038] kernel: usb 3-4: New USB device found, idVendor=04f3, idProduct=0c9f, bcdDevice= 8.03
[ 5254.128382] kernel: usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 5254.128518] kernel: usb 3-4: Product: ELAN:ARM-M4
[ 5254.128634] kernel: usb 3-4: Manufacturer: ELAN
[ 5254.128744] kernel: usb 3-4: Device is not authorized for usage
[ 5254.132045] kernel: usb 3-4: authorized to connect
[ 5259.844069] kernel: usb 3-4: USB disconnect, device number 5
[ 5260.092265] kernel: usb 3-4: new full-speed USB device number 6 using xhci_hcd
[ 5260.260030] kernel: usb 3-4: New USB device found, idVendor=04f3, idProduct=0c9f, bcdDevice= 8.03
[ 5260.260343] kernel: usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 5260.260484] kernel: usb 3-4: Product: ELAN:ARM-M4
[ 5260.260599] kernel: usb 3-4: Manufacturer: ELAN
[ 5260.260711] kernel: usb 3-4: Device is not authorized for usage
[ 5260.264025] kernel: usb 3-4: authorized to connect
[ 5265.864043] kernel: usb 3-4: USB disconnect, device number 6
[ 5265.988113] kernel: usb 3-4: new full-speed USB device number 7 using xhci_hcd
[ 5266.156039] kernel: usb 3-4: New USB device found, idVendor=04f3, idProduct=0c9f, bcdDevice= 8.03
[ 5266.156357] kernel: usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 5266.156489] kernel: usb 3-4: Product: ELAN:ARM-M4
[ 5266.156606] kernel: usb 3-4: Manufacturer: ELAN
[ 5266.156714] kernel: usb 3-4: Device is not authorized for usage
[ 5266.160031] kernel: usb 3-4: authorized to connect
[ 5271.880036] kernel: usb 3-4: USB disconnect, device number 7
[ 5272.136191] kernel: usb 3-4: new full-speed USB device number 8 using xhci_hcd
[ 5272.304041] kernel: usb 3-4: New USB device found, idVendor=04f3, idProduct=0c9f, bcdDevice= 8.03
[ 5272.304371] kernel: usb 3-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 5272.304511] kernel: usb 3-4: Product: ELAN:ARM-M4
[ 5272.304623] kernel: usb 3-4: Manufacturer: ELAN
[ 5272.304727] kernel: usb 3-4: Device is not authorized for usage
[ 5272.308026] kernel: usb 3-4: authorized to connect
[ 5277.916053] kernel: usb 3-4: USB disconnect, device number 8

Full kernel log attached.

View attachment "kernel.log" of type "text/plain" (132651 bytes)