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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1881888

Title:
  Atheros AR3012 Bluetooth    Bluetooth [04ca:300b] Always Disconnected
  After Suspend

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  After suspend (either manually or automatically), every time I connect
  my phone to the computer through bluetooth, it always disconnected
  after several seconds.

  Inspecting hcitrace from btmon, I got:

  ```
  < ACL Data TX: Handle 21 flags 0x00 dlen 16              #209 [hci0] 
121.395244
        L2CAP: Connection Response (0x03) ident 16 len 8
          Destination CID: 0
          Source CID: 68
          Result: Connection refused - PSM not supported (0x0002)
          Status: No further information available (0x0000)
  >
  ```

  Often, the symptom is when I play audio from connected phone, I didn't
  hear the sound from my headset connected on my computer, even though I
  maxed out volume on the phone.

  The problem does not occur when the computer rebooted.

  Bluetooth Phone Device: vivo 1609 (Vivo V5 Lite)
  Bluetooth Device Version: 2.5 (Bluetooth Share APK)
  bluetoothctl version: 5.53

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: bluez 5.53-0ubuntu3
  ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34
  Uname: Linux 5.4.0-33-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Wed Jun  3 17:47:59 2020
  InstallationDate: Installed on 2020-05-05 (28 days ago)
  InstallationMedia: Ubuntu-MATE 20.04 LTS "Focal Fossa" - Release amd64 
(20200423)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: Acer Aspire E5-571
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-33-generic 
root=UUID=30956875-cf76-41af-963e-866e73f8e23e ro
  SourcePackage: bluez
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/06/2014
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V1.04
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: EA50_HB
  dmi.board.vendor: Acer
  dmi.board.version: V1.04
  dmi.chassis.asset.tag: Chassis Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnInsydeCorp.:bvrV1.04:bd05/06/2014:svnAcer:pnAspireE5-571:pvrV1.04:rvnAcer:rnEA50_HB:rvrV1.04:cvnAcer:ct10:cvrChassisVersion:
  dmi.product.family: SharkBay System
  dmi.product.name: Aspire E5-571
  dmi.product.sku: Aspire E5-571_0866_V1.04
  dmi.product.version: V1.04
  dmi.sys.vendor: Acer
  hciconfig:
   hci0:        Type: Primary  Bus: USB
    BD Address: 18:CF:5E:0F:06:FB  ACL MTU: 1022:8  SCO MTU: 183:5
    UP RUNNING PSCAN
    RX bytes:3010 acl:50 sco:0 events:153 errors:0
    TX bytes:5047 acl:50 sco:0 commands:67 errors:0

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