[Bug 1881888] Re: Atheros AR3012 Bluetooth Bluetooth [04ca:300b] Always Disconnected After Suspend

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
Status: Incomplete => Expired

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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:
Expired

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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