Bluetooth asus-tf101

# When I type bluetoothctl, it stays on this message forever

asus-tf101:~$ sudo bluetoothctl
Waiting to connect to bluetoothd...

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# I compiled btusb module on kernel as this link says: https://unix.stackexchange.com/questions/402623/waiting-to-connect-to-bluetoothd/413272

# btusb was not compiled by default in the asus-tf101 kernel. Therefore, I got no errors. It has been loaded successfully.

asus-tf101:~$ cat /etc/modules-load.d/00-device-asus-tf101.conf
bcmdhd
btusb

asus-tf101:~$ dmesg | grep btusb
[   25.255617] usbcore: registered new interface driver btusb

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# Then, I tried to debug the bluetooth daemon, that's what happened.

asus-tf101:~$ sudo /usr/lib/bluetooth/bluetoothd -n -d
bluetoothd[1457]: Bluetooth daemon 5.55
bluetoothd[1457]: src/main.c:parse_config() parsing /etc/bluetooth/main.conf
bluetoothd[1457]: src/main.c:parse_config() discovto=0
bluetoothd[1457]: src/main.c:parse_config() pairable=false
bluetoothd[1457]: src/main.c:parse_config() pairto=0
bluetoothd[1457]: src/main.c:parse_config() privacy=off
bluetoothd[1457]: src/main.c:parse_config() just_works_repairing=never
bluetoothd[1457]: src/main.c:parse_config() tmpto=30
bluetoothd[1457]: src/main.c:parse_config() name=BlueZ-asus-tf101
bluetoothd[1457]: src/main.c:parse_config() class=0x000100
bluetoothd[1457]: src/main.c:parse_config() deviceid=54:04:A6:0E:93:EE
bluetoothd[1457]: src/main.c:parse_config() ControllerMode=dual
bluetoothd[1457]: src/main.c:parse_config() MultiProfile=off
bluetoothd[1457]: src/main.c:parse_config() Key file does not have group “GATT”
bluetoothd[1457]: src/main.c:parse_config() Key file does not have group “GATT”
bluetoothd[1457]: src/main.c:parse_config() Key file does not have group “GATT”
bluetoothd[1457]: src/main.c:parse_config() Key file does not have group “GATT”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/main.c:parse_controller_config() Key file does not have group “Controller”
bluetoothd[1457]: src/adapter.c:adapter_init() Failed to access management interface
bluetoothd[1457]: src/main.c:main() Adapter handling initialization failed

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# Here's my /etc/bluetooth/main.conf

asus-tf101:~$ cat /etc/bluetooth/main.conf
[General]

# Default adapter name
# Defaults to 'BlueZ X.YZ'
Name = BlueZ-asus-tf101

# Default device class. Only the major and minor device class bits are
# considered. Defaults to '0x000000'.
Class = 0x000100

# How long to stay in discoverable mode before going back to non-discoverable
# The value is in seconds. Default is 180, i.e. 3 minutes.
# 0 = disable timer, i.e. stay discoverable forever
DiscoverableTimeout = 0

# Always allow pairing even if there are no agent registered
# Possible values: true, false
# Default: false
AlwaysPairable = false

# How long to stay in pairable mode before going back to non-discoverable
# The value is in seconds. Default is 0.
# 0 = disable timer, i.e. stay pairable forever
PairableTimeout = 0

# Use vendor id source (assigner), vendor, product and version information for
# DID profile support. The values are separated by ":" and assigner, VID, PID
# and version.
# Possible vendor id source values: bluetooth, usb (defaults to usb)

# DeviceID = 54:04:A6:0E:93:EE

# Do reverse service discovery for previously unknown devices that connect to
# us. For BR/EDR this option is really only needed for qualification since the
# BITE tester doesn't like us doing reverse SDP for some test cases, for LE
# this disables the GATT client functionally so it can be used in system which
# can only operate as peripheral.
# Defaults to 'true'.
ReverseServiceDiscovery = true

# Enable name resolving after inquiry. Set it to 'false' if you don't need
# remote devices name and want shorter discovery cycle. Defaults to 'true'.
NameResolving = true

# Enable runtime persistency of debug link keys. Default is false which
# makes debug link keys valid only for the duration of the connection
# that they were created for.
DebugKeys = false

# Restricts all controllers to the specified transport. Default value
# is "dual", i.e. both BR/EDR and LE enabled (when supported by the HW).
# Possible values: "dual", "bredr", "le"
ControllerMode = dual

# Enables Multi Profile Specification support. This allows to specify if
# system supports only Multiple Profiles Single Device (MPSD) configuration
# or both Multiple Profiles Single Device (MPSD) and Multiple Profiles Multiple
# Devices (MPMD) configurations.
# Possible values: "off", "single", "multiple"
MultiProfile = off

# Permanently enables the Fast Connectable setting for adapters that
# support it. When enabled other devices can connect faster to us,
# however the tradeoff is increased power consumptions. This feature
# will fully work only on kernel version 4.1 and newer. Defaults to
# 'false'.
FastConnectable = false

# Default privacy setting.
# Enables use of private address.
# Possible values: "off", "device", "network"
# "network" option not supported currently
# Defaults to "off"
Privacy = off

# Specify the policy to the JUST-WORKS repairing initiated by peer
# Possible values: "never", "confirm", "always"
# Defaults to "never"
JustWorksRepairing = never

# How long to keep temporary devices around
# The value is in seconds. Default is 30.
# 0 = disable timer, i.e. never keep temporary devices
TemporaryTimeout = 30

# Enables the device to issue an SDP request to update known services when
# profile is connected. Defaults to true.
#RefreshDiscovery = true

#[Controller]
# The following values are used to load default adapter parameters.  BlueZ loads
# the values into the kernel before the adapter is powered if the kernel
# supports the MGMT_LOAD_DEFAULT_PARAMETERS command. If a value isn't provided,
# the kernel will be initialized to it's default value.  The actual value will
# vary based on the kernel version and thus aren't provided here.
# The Bluetooth Core Specification should be consulted for the meaning and valid
# domain of each of these values.

# BR/EDR Page scan activity configuration
#BRPageScanType=
#BRPageScanInterval=
#BRPageScanWindow=

# BR/EDR Inquiry scan activity configuration
#BRInquiryScanType=
#BRInquiryScanInterval=
#BRInquiryScanWindow=

# BR/EDR Link supervision timeout
#BRLinkSupervisionTimeout=

# BR/EDR Page Timeout
#BRPageTimeout=

# BR/EDR Sniff Intervals
#BRMinSniffInterval=
#BRMaxSniffInterval=

# LE advertisement interval (used for legacy advertisement interface only)
#LEMinAdvertisementInterval=
#LEMaxAdvertisementInterval=
#LEMultiAdvertisementRotationInterval=

# LE scanning parameters used for passive scanning supporting auto connect
# scenarios
#LEScanIntervalAutoConnect=
#LEScanWindowAutoConnect=

# LE scanning parameters used for passive scanning supporting wake from suspend
# scenarios
#LEScanIntervalSuspend=
#LEScanWindowSuspend=

# LE scanning parameters used for active scanning supporting discovery
# proceedure
#LEScanIntervalDiscovery=
#LEScanWindowDiscovery=

# LE scanning parameters used for passive scanning supporting the advertisement
# monitor Apis
#LEScanIntervalAdvMonitor=
#LEScanWindowAdvMonitor=

# LE scanning parameters used for connection establishment.
#LEScanIntervalConnect=
#LEScanWindowConnect=

# LE default connection parameters.  These values are superceeded by any
# specific values provided via the Load Connection Parameters interface
#LEMinConnectionInterval=
#LEMaxConnectionInterval=
#LEConnectionLatency=
#LEConnectionSupervisionTimeout=
#LEAutoconnecttimeout=

#[GATT]
# GATT attribute cache.
# Possible values:
# always: Always cache attributes even for devices not paired, this is
# recommended as it is best for interoperability, with more consistent
# reconnection times and enables proper tracking of notifications for all
# devices.
# yes: Only cache attributes of paired devices.
# no: Never cache attributes
# Default: always
#Cache = always

# Minimum required Encryption Key Size for accessing secured characteristics.
# Possible values: 0 and 7-16. 0 means don't care.
# Defaults to 0
#KeySize = 0

# Exchange MTU size.
# Possible values: 23-517
# Defaults to 517
#ExchangeMTU = 517

# Number of ATT channels
# Possible values: 1-5 (1 disables EATT)
# Default to 3
#Channels = 3

#[Policy]
#
# The ReconnectUUIDs defines the set of remote services that should try
# to be reconnected to in case of a link loss (link supervision
# timeout). The policy plugin should contain a sane set of values by
# default, but this list can be overridden here. By setting the list to
# empty the reconnection feature gets disabled.
#ReconnectUUIDs=00001112-0000-1000-8000-00805f9b34fb,0000111f-0000-1000-8000-00805f9b34fb,0000110a-0000-1000-8000-00805f9b34fb

# ReconnectAttempts define the number of attempts to reconnect after a link
# lost. Setting the value to 0 disables reconnecting feature.
#ReconnectAttempts=7

# ReconnectIntervals define the set of intervals in seconds to use in between
# attempts.
# If the number of attempts defined in ReconnectAttempts is bigger than the
# set of intervals the last interval is repeated until the last attempt.
#ReconnectIntervals=1,2,4,8,16,32,64

# AutoEnable defines option to enable all controllers when they are found.
# This includes adapters present on start as well as adapters that are plugged
# in later on. Defaults to 'false'.
#AutoEnable=false

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