Re: Audio interface causing "xhci_hcd ... WARN: buffer overrun event" messages

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From: Robert Ham <rah@settrans.net>
To: "Michał Pecio" <michal.pecio@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: Audio interface causing "xhci_hcd ... WARN: buffer overrun event" messages
Date: Thu, 31 Jul 2025 11:04:40 +0100	[thread overview]
Message-ID: <87114caf-7c0d-4e51-bb3e-f171fc20ac62@settrans.net> (raw)
In-Reply-To: <20250731101720.5d10a8f1@foxbook>


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On 31/07/2025 09:17, Michał Pecio wrote:
> Can you mount debugfs and see if you can find the directory below? It
> would tell if there is anything unusual about those 1 in 65 buffers.
> 
> /sys/kernel/debug/usb/xhci/0000:00:14.0/

Umm.. and this is with the device connected and snd-usb-audio loaded,
which might be more helpful :-)

/sys/kernel/debug/usb/xhci/0000:00:14.0/
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port01
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port01/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port02
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port02/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port03
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port03/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port04
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port04/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port05
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port05/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port06
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port06/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port07
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port07/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port08
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port08/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port09
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port09/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port10
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port10/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port11
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port11/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port12
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port12/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port13
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port13/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port14
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port14/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port15
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port15/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port16
/sys/kernel/debug/usb/xhci/0000:00:14.0/ports/port16/portsc
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep03
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep03/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep03/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep03/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep03/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep02
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep02/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep02/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep02/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep02/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/slot-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/name
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep00
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep00/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep00/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep00/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/04/ep00/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep04
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep04/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep04/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep04/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep04/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/slot-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/name
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep00
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep00/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep00/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep00/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/03/ep00/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep02
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep02/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep02/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep02/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep02/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/slot-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/name
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep00
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep00/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep00/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep00/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/02/ep00/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep06
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep06/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep06/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep06/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep06/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep05
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep05/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep05/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep05/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep05/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep04
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep04/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep04/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep04/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep04/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep03
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep03/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep03/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep03/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep03/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep02
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep02/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep02/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep02/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep02/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/slot-context
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/name
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep00
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep00/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep00/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep00/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/devices/01/ep00/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/event-ring
/sys/kernel/debug/usb/xhci/0000:00:14.0/event-ring/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/event-ring/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/event-ring/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/event-ring/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/command-ring
/sys/kernel/debug/usb/xhci/0000:00:14.0/command-ring/trbs
/sys/kernel/debug/usb/xhci/0000:00:14.0/command-ring/cycle
/sys/kernel/debug/usb/xhci/0000:00:14.0/command-ring/dequeue
/sys/kernel/debug/usb/xhci/0000:00:14.0/command-ring/enqueue
/sys/kernel/debug/usb/xhci/0000:00:14.0/reg-ext-dbc:00
/sys/kernel/debug/usb/xhci/0000:00:14.0/reg-ext-protocol:01
/sys/kernel/debug/usb/xhci/0000:00:14.0/reg-ext-protocol:00
/sys/kernel/debug/usb/xhci/0000:00:14.0/reg-ext-legsup:00
/sys/kernel/debug/usb/xhci/0000:00:14.0/reg-runtime
/sys/kernel/debug/usb/xhci/0000:00:14.0/reg-op
/sys/kernel/debug/usb/xhci/0000:00:14.0/reg-cap

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next prev parent reply	other threads:[~2025-07-31 10:04 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-30 20:02 Audio interface causing "xhci_hcd ... WARN: buffer overrun event" messages Bob Ham
2025-07-31  8:17 ` Michał Pecio
2025-07-31  8:27   ` Michał Pecio
2025-07-31 10:11     ` Robert Ham
2025-07-31 14:26       ` Mathias Nyman
2025-08-02  8:43         ` Robert Ham
2025-07-31  9:56   ` Robert Ham
2025-07-31 10:04   ` Robert Ham [this message]
2025-07-31 20:21     ` Michał Pecio

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