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From: Marcel Holtmann <>
To: Hui Wang <>
Cc: Bluetooth Kernel Mailing List <>,
	Johan Hedberg <>
Subject: Re: [PATCH] Bluetooth: btusb: Add a module parameter ignore_id for debugging
Date: Sun, 2 Aug 2020 16:58:19 +0200
Message-ID: <> (raw)
In-Reply-To: <>

Hi Hui,

> There is always an on-board usb bluetooth hci on the laptops, if
> the bluetooth function doesn't work well like a bt headset can't work
> with HSP/HFP mode, we often plug an external usb BT hci to verify if
> that headset could work with the exteral BT hci or not, in this
> situation, there will be 2 hcis (hci0 and hci1) in the system, and
> so far, the gnome can't handle the hci1 well so we met lots of
> problems when debugging with hci1 under gnome.
> After adding this new module parameter, we could ban the on-board
> usb hci by putting btusb.ignore_id=idVendor,idProduct to the bootargs,
> then the external usb hci will be hci0 and there is only one hci
> in the system. We could easily debug with the external usb bluetooth
> hci after this change.
> Signed-off-by: Hui Wang <>
> ---
> drivers/bluetooth/btusb.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)

please use this instead.

echo “vvvv pppp 0 08fd 0002" > /sys/bus/usb/drivers/foo/new_id



  reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-02  4:21 Hui Wang
2020-08-02 14:58 ` Marcel Holtmann [this message]
2020-08-03  2:55   ` Hui Wang
2020-08-03  6:45     ` Marcel Holtmann
2020-08-03  7:59       ` Hui Wang

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