linux-kernel - Re: Qualcomm Atheros QCA61x4 keeps drawing 0.85 W despite Bluetooth being disable in GNOME

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Message-ID: <41253614-764e-4e95-b052-a46bf5587c29@rowland.harvard.edu>
Date:   Mon, 20 Nov 2023 13:10:29 -0500
From:   Alan Stern <stern@...land.harvard.edu>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-pm@...r.kernel.org,
        Hans de Goede <hdegoede@...hat.com>,
        Mike Jones <mike@...nes.io>
Subject: Re: Qualcomm Atheros QCA61x4 keeps drawing 0.85 W despite Bluetooth
 being disable in GNOME

On Mon, Nov 20, 2023 at 08:52:19AM +0100, Paul Menzel wrote:
> Dear Alan,
> 
> 
> Than you again for your quick reply.
> 
> Am 20.11.23 um 03:26 schrieb Alan Stern:
> > On Sun, Nov 19, 2023 at 11:09:32PM +0100, Paul Menzel wrote:
> > > $ sudo modprobe btusb
> > 
> > > $ grep . /sys/bus/usb/devices/1-3/power/*
> > > /sys/bus/usb/devices/1-3/power/active_duration:119053224
> > > /sys/bus/usb/devices/1-3/power/async:enabled
> > > /sys/bus/usb/devices/1-3/power/autosuspend:2
> > > /sys/bus/usb/devices/1-3/power/autosuspend_delay_ms:2000
> > > /sys/bus/usb/devices/1-3/power/connected_duration:148065372
> > > /sys/bus/usb/devices/1-3/power/control:auto
> > > /sys/bus/usb/devices/1-3/power/level:auto
> > > /sys/bus/usb/devices/1-3/power/persist:1
> > > /sys/bus/usb/devices/1-3/power/runtime_active_kids:0
> > > /sys/bus/usb/devices/1-3/power/runtime_active_time:119060567
> > > /sys/bus/usb/devices/1-3/power/runtime_enabled:enabled
> > > /sys/bus/usb/devices/1-3/power/runtime_status:active
> > > /sys/bus/usb/devices/1-3/power/runtime_suspended_time:28831453
> > > /sys/bus/usb/devices/1-3/power/runtime_usage:0
> > > /sys/bus/usb/devices/1-3/power/wakeup:disabled
> > > ```
> > 
> > Hmmm.  It's not immediately clear why the device isn't being suspended.
> > The btusb driver does support autosuspend.
> > 
> > Can you also post the output from
> > 
> > 	grep . /sys/bus/usb/devices/1-3:*/power/*
> > 
> > with the driver module loaded?  I should have asked for it before.
> 
> ```
> $ sudo modprobe btusb
> $ sudo dmesg | tail -9
> [319747.390712] r8152 4-1.2:1.0 enx18dbf22dccf3: carrier on
> [320256.946094] bluetooth hci0: firmware: direct-loading firmware
> qca/rampatch_usb_00000302.bin
> [320256.949333] Bluetooth: hci0: using rampatch file:
> qca/rampatch_usb_00000302.bin
> [320256.949349] Bluetooth: hci0: QCA: patch rome 0x302 build 0x3e8, firmware
> rome 0x302 build 0x111
> [320256.949643] usbcore: registered new interface driver btusb
> [320257.308935] bluetooth hci0: firmware: direct-loading firmware
> qca/nvm_usb_00000302.bin
> [320257.309043] Bluetooth: hci0: using NVM file: qca/nvm_usb_00000302.bin
> [320257.336220] Bluetooth: hci0: HCI Enhanced Setup Synchronous Connection
> command is advertised, but not supported.
> [320257.638188] Bluetooth: MGMT ver 1.22
> $ /sbin/rfkill
> ID TYPE      DEVICE    SOFT      HARD
>  1 wlan      phy0   blocked unblocked
> 28 bluetooth hci0   blocked unblocked
> $ grep . /sys/bus/usb/devices/1-3:*/power/*
> /sys/bus/usb/devices/1-3:1.0/power/async:enabled
> /sys/bus/usb/devices/1-3:1.0/power/runtime_active_kids:0
> /sys/bus/usb/devices/1-3:1.0/power/runtime_enabled:enabled
> /sys/bus/usb/devices/1-3:1.0/power/runtime_status:suspended
> /sys/bus/usb/devices/1-3:1.0/power/runtime_usage:0
> /sys/bus/usb/devices/1-3:1.1/power/async:enabled
> /sys/bus/usb/devices/1-3:1.1/power/runtime_active_kids:0
> /sys/bus/usb/devices/1-3:1.1/power/runtime_enabled:enabled
> /sys/bus/usb/devices/1-3:1.1/power/runtime_status:suspended
> /sys/bus/usb/devices/1-3:1.1/power/runtime_usage:0
> ```

Again, nothing out of the ordinary.  Maybe dynamic debugging will give 
us a clue.  Try doing this:

	Unload the btusb module.

	echo module usbcore +p >/sys/kernel/debug/dynamic_debug/control

	Load the btusb module

	Make sure that Bluetooth is turned off in Gnome

	Wait a few seconds

	echo module usbcore -p >/sys/kernel/debug/dynamic_debug/control

Then let's see what the dmesg log contains for that time period.

Also, please post the output from "lsusb -v" for the Bluetooth device.

Alan Stern