Hi, thanks for help. When i manually try to connect in ubuntu settings, yes, there are this messages:

May 20 12:50:29 felipe-Nitro-AN515-52 bluetoothd[1257]: Unable to get Headset Voice gateway SDP record: Device or resource busy
May 20 12:50:29 felipe-Nitro-AN515-52 bluetoothd[1257]: connect error: Device or resource busy (16)


But, when the phone is paired and i just turn the paired phone again, the status "connected" blinks (change to "connected" for a second, and then change to disconnected again), but no messages are printed.

I have also messages when i pair the fone  (after removing from device list), and when i disconnected from that real connection (first use after pairing).



Connecting:

May 20 13:08:30 felipe-Nitro-AN515-52 gnome-control-c[69201]: Setting up /org/bluez/hci0/dev_1C_52_16_B6_64_01 failed: GDBus.Error:org.bluez.Error.ConnectionAttemptFailed: Page Timeout
May 20 13:08:38 felipe-Nitro-AN515-52 bluetoothd[1257]: /org/bluez/hci0/dev_1C_52_16_B6_64_01/sep1/fd7: fd(146) ready
May 20 13:08:38 felipe-Nitro-AN515-52 rtkit-daemon[1600]: Supervising 12 threads of 8 processes of 2 users.
May 20 13:08:38 felipe-Nitro-AN515-52 rtkit-daemon[1600]: Successfully made thread 69567 of process 2149 owned by '1000' RT at priority 5.
May 20 13:08:38 felipe-Nitro-AN515-52 rtkit-daemon[1600]: Supervising 13 threads of 8 processes of 2 users.
May 20 13:08:38 felipe-Nitro-AN515-52 kernel: [170513.995309] input: Redmi AirDots_R (AVRCP) as /devices/virtual/input/input44
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) config/udev: Adding input device Redmi AirDots_R (AVRCP) (/dev/input/event16)
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Redmi AirDots_R (AVRCP): Applying InputClass "libinput keyboard catchall"
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) Using input driver 'libinput' for 'Redmi AirDots_R (AVRCP)'
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) systemd-logind: got fd for /dev/input/event16 13:80 fd 108 paused 0
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Redmi AirDots_R (AVRCP): always reports core events
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Option "Device" "/dev/input/event16"
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Option "_source" "server/udev"
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[1537]: (II) config/udev: Adding input device Redmi AirDots_R (AVRCP) (/dev/input/event16)
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[1537]: (**) Redmi AirDots_R (AVRCP): Applying InputClass "libinput keyboard catchall"
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[1537]: (II) Using input driver 'libinput' for 'Redmi AirDots_R (AVRCP)'
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) event16 - Redmi AirDots_R (AVRCP): is tagged by udev as: Keyboard
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) event16 - Redmi AirDots_R (AVRCP): device is a keyboard
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[1537]: (II) systemd-logind: got fd for /dev/input/event16 13:80 fd 30 paused 1
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[1537]: (II) systemd-logind: releasing fd for 13:80
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) event16 - Redmi AirDots_R (AVRCP): device removed
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Option "config_info" "udev:/sys/devices/virtual/input/input44/event16"
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) XINPUT: Adding extended input device "Redmi AirDots_R (AVRCP)" (type: KEYBOARD, id 20)
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Option "xkb_model" "pc105"
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Option "xkb_layout" "br"
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (WW) Option "xkb_variant" requires a string value
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (WW) Option "xkb_options" requires a string value
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) event16 - Redmi AirDots_R (AVRCP): is tagged by udev as: Keyboard
May 20 13:08:38 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) event16 - Redmi AirDots_R (AVRCP): device is a keyboard



Disconnecting:

May 20 13:11:29 felipe-Nitro-AN515-52 acpid: input device has been disconnected, fd 18
May 20 13:11:29 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) config/udev: removing device Redmi AirDots_R (AVRCP)
May 20 13:11:29 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (**) Option "fd" "108"
May 20 13:11:29 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) event16 - Redmi AirDots_R (AVRCP): device removed
May 20 13:11:29 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) UnloadModule: "libinput"
May 20 13:11:29 felipe-Nitro-AN515-52 /usr/lib/gdm3/gdm-x-session[2242]: (II) systemd-logind: releasing fd for 13:80
May 20 13:11:29 felipe-Nitro-AN515-52 bluetoothd[1257]: Unable to get io data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107)
May 20 13:11:29 felipe-Nitro-AN515-52 kernel: [170684.957685] audit: type=1107 audit(1589991089.734:6361): pid=1260 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_signal"  bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManager" member="CheckPermissions" name=":1.12" mask="receive" pid=11376 label="snap.spotify.spotify" peer_pid=1262 peer_label="unconfined"
May 20 13:11:29 felipe-Nitro-AN515-52 kernel: [170684.957685]  exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
May 20 13:11:29 felipe-Nitro-AN515-52 gsd-media-keys[2578]: Unable to get default sink