Bluetooth headphones and microphone not detected

[Dvbnhbq]

Trouble when connecting paired bluetooth headphones on Ubuntu 20.04.
The bluetooth headphones can be paired, but not connected.

```
$ bluetoothctl

# scan on
Discovery started
[CHG] Controller F0:85:C1:FF:BD:A8 Discovering: yes
[NEW] Device FC:58:FA:CF:D0:01 BT-1100
# scan off
Discovery stopped
[CHG] Controller F0:85:C1:FF:BD:A8 Discovering: no
[CHG] Device FC:58:FA:CF:D0:01 RSSI is nil
# devices
Device FC:58:FA:CF:D0:01 BT-1100
# pair FC:58:FA:CF:D0:01
Attempting to pair with FC:58:FA:CF:D0:01
[CHG] Device FC:58:FA:CF:D0:01 Connected: yes
[CHG] Device FC:58:FA:CF:D0:01 Connected: no
[CHG] Device FC:58:FA:CF:D0:01 Connected: yes
[CHG] Device FC:58:FA:CF:D0:01 UUIDs: 00001108-0000-1000-8000-00805f9b34fb
[CHG] Device FC:58:FA:CF:D0:01 UUIDs: 0000110b-0000-1000-8000-00805f9b34fb
[CHG] Device FC:58:FA:CF:D0:01 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Device FC:58:FA:CF:D0:01 UUIDs: 0000111e-0000-1000-8000-00805f9b34fb
[CHG] Device FC:58:FA:CF:D0:01 ServicesResolved: yes
[CHG] Device FC:58:FA:CF:D0:01 Paired: yes
Pairing successful
[CHG] Device FC:58:FA:CF:D0:01 ServicesResolved: no
[CHG] Device FC:58:FA:CF:D0:01 Connected: no
# connect FC:58:FA:CF:D0:01
Attempting to connect to FC:58:FA:CF:D0:01
[CHG] Device FC:58:FA:CF:D0:01 Connected: yes
[CHG] Device FC:58:FA:CF:D0:01 Connected: no
Failed to connect: org.bluez.Error.Failed
[CHG] Device FC:58:FA:CF:D0:01 Connected: yes
[CHG] Device FC:58:FA:CF:D0:01 Connected: no
```

Logs:
```
Jan 05 00:59:00 host1 bluetoothd[536]: Unable to get connect data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107)
Jan 05 00:59:02 host1 bluetoothd[536]: connect error: Connection reset by peer (104)
Jan 05 00:59:37 host1 bluetoothd[536]: connect error: Connection reset by peer (104)
```

Pulseaudio configs:
```
$ grep -P '(bluetooth|bluez)' /etc/pulse/default.pa /etc/pulse/system.pa
/etc/pulse/default.pa:#.ifexists module-bluetooth-policy.so
/etc/pulse/default.pa:load-module module-bluetooth-policy
/etc/pulse/default.pa:#.ifexists module-bluetooth-discover.so
/etc/pulse/default.pa:load-module module-bluetooth-discover
/etc/pulse/system.pa:load-module module-bluez5-device
/etc/pulse/system.pa:load-module module-bluez5-discover
```

Packages installed:
```
$ dpkg -l | grep -P '(bluetooth|bluez)'
ii blueman 2.1.2-1ubuntu0.2 amd64 Graphical bluetooth manager
ii bluez 5.53-0ubuntu3 amd64 Bluetooth tools and daemons
ii bluez-obexd 5.53-0ubuntu3 amd64 bluez obex daemon
ii bluez-tools 2.0~20170911.0.7cb788c-2build1 amd64 Set of tools to manage Bluetooth devices for linux
ii libbluetooth3:amd64 5.53-0ubuntu3 amd64 Library to use the BlueZ Linux Bluetooth stack
ii pulseaudio-module-bluetooth 1:13.99.1-1ubuntu3.8 amd64 Bluetooth module for PulseAudio sound server
```

```
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal

$ uname -a
Linux host1 5.4.0-59-generic #65-Ubuntu SMP Thu Dec 10 12:01:51 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
```

Please help.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-60.67-generic 5.4.78
Uname: Linux 5.4.0-60-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
AudioDevicesInUse: Error: [Errno 2] No such file or directory: 'fuser'
CasperMD5CheckResult: skip
Date: Wed Jan 13 17:18:39 2021
PackageArchitecture: all
ProcEnviron:
 TERM=st-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Title: Bluetooth sound card not detected
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/14/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 8.17
dmi.board.asset.tag: Default string
dmi.board.name: CITI E202 ES2002EW
dmi.board.vendor: Digma
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 31
dmi.chassis.vendor: Digma
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr8.17:bd03/14/2018:svnDigma:pnCITIE202ES2002EW:pvrDefaultstring:rvnDigma:rnCITIE202ES2002EW:rvr1.0:cvnDigma:ct31:cvrDefaultstring:
dmi.product.family: EMI30P3S6M22L18B320T4C00W1H2G0G3A1C2P1C0D0C1801M0N1X1WOS
dmi.product.name: CITI E202 ES2002EW
dmi.product.sku: 20180313288
dmi.product.version: Default string
dmi.sys.vendor: Digma