[Bug 1616695] [NEW] Bluetooth signal is unusably poor

ZachG 1616695 at bugs.launchpad.net
Thu Aug 25 00:56:26 UTC 2016 

Public bug reported:

Brand new Macbook Pro 12,1.  Brand new Ubuntu 16.04 install (from
scratch).

In MacOS the machine can connect to my bluetooth speaker from across the
room and play A2DP no trouble at all.  In Ubuntu 16.04 I have to
literally hold up the macbook 1 inch away from the speaker to get it to
connect and play, and even then it's a bit choppy.  Turning off Wifi
seems to help a bit, which leads me to think this is some kind of
transmit power issue.

Syslog is chock full of warnings about skipping audio:

Aug 24 16:22:32 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 206099 us (= 36352 bytes) in audio stream
Aug 24 16:22:32 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 382089 us (= 67400 bytes) in audio stream
Aug 24 16:22:33 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 394108 us (= 69520 bytes) in audio stream
Aug 24 16:22:33 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 328125 us (= 57880 bytes) in audio stream
Aug 24 16:22:33 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 59087 us (= 10420 bytes) in audio stream
Aug 24 16:22:33 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 14036 us (= 2472 bytes) in audio stream
Aug 24 16:22:34 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 247134 us (= 43592 bytes) in audio stream
Aug 24 16:22:34 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 342190 us (= 60360 bytes) in audio stream
Aug 24 16:22:34 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 172035 us (= 30344 bytes) in audio stream
Aug 24 16:22:35 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 803140 us (= 141672 bytes) in audio stream
Aug 24 16:22:36 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 651085 us (= 114848 bytes) in audio stream
Aug 24 16:22:36 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 202043 us (= 35640 bytes) in audio stream
Aug 24 16:22:36 badassm pulseaudio[4655]: [bluetooth] module-bluez5-device.c: Skipping 265112 us (= 46764 bytes) in audio stream


$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=16.04
DISTRIB_CODENAME=xenial
DISTRIB_DESCRIPTION="Ubuntu 16.04.1 LTS"

$ uname -a
Linux badassm 4.4.0-34-generic #53-Ubuntu SMP Wed Jul 27 16:06:39 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

$ lsusb
Bus 002 Device 002: ID 05ac:8406 Apple, Inc. 
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 05ac:0273 Apple, Inc. 
Bus 001 Device 003: ID 05ac:8290 Apple, Inc. 
Bus 001 Device 006: ID 045e:00db Microsoft Corp. Natural Ergonomic Keyboard 4000 V1.0
Bus 001 Device 005: ID 05e3:0608 Genesys Logic, Inc. Hub
Bus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

$ hciconfig 
hci0:	Type: BR/EDR  Bus: USB
	BD Address: 98:01:A7:A8:D4:6A  ACL MTU: 1021:8  SCO MTU: 64:1
	UP RUNNING PSCAN 
	RX bytes:5198 acl:2 sco:0 events:269 errors:0
	TX bytes:7021 acl:2 sco:0 commands:218 errors:0

[bluetooth]# show
Controller 98:01:A7:A8:D4:6A
	Name: badassm
	Alias: badassm
	Class: 0x1c010c
	Powered: yes
	Discoverable: no
	Pairable: yes
	UUID: Headset AG                (00001112-0000-1000-8000-00805f9b34fb)
	UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
	UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
	UUID: OBEX File Transfer        (00001106-0000-1000-8000-00805f9b34fb)
	UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
	UUID: OBEX Object Push          (00001105-0000-1000-8000-00805f9b34fb)
	UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
	UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
	UUID: IrMC Sync                 (00001104-0000-1000-8000-00805f9b34fb)
	UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
	UUID: Audio Source              (0000110a-0000-1000-8000-00805f9b34fb)
	UUID: Vendor specific           (00005005-0000-1000-8000-0002ee000001)
	UUID: Message Notification Se.. (00001133-0000-1000-8000-00805f9b34fb)
	UUID: Phonebook Access Server   (0000112f-0000-1000-8000-00805f9b34fb)
	UUID: Message Access Server     (00001132-0000-1000-8000-00805f9b34fb)
	Modalias: usb:v1D6Bp0246d0525
	Discovering: no

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: bluez 5.37-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: GNOME-Flashback:Unity
Date: Wed Aug 24 17:47:46 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-08-24 (0 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: Apple Inc. MacBookPro12,1
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-34-generic.efi.signed root=UUID=69f43848-5724-45c9-be2b-9be6abeec962 ro quiet splash
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/23/2016
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP121.88Z.0167.B17.1606231721
dmi.board.name: Mac-E43C1C25D4880AD6
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro12,1
dmi.chassis.type: 9
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-E43C1C25D4880AD6
dmi.modalias: dmi:bvnAppleInc.:bvrMBP121.88Z.0167.B17.1606231721:bd06/23/2016:svnAppleInc.:pnMacBookPro12,1:pvr1.0:rvnAppleInc.:rnMac-E43C1C25D4880AD6:rvrMacBookPro12,1:cvnAppleInc.:ct9:cvrMac-E43C1C25D4880AD6:
dmi.product.name: MacBookPro12,1
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
hciconfig:
 hci0:	Type: BR/EDR  Bus: USB
 	BD Address: 98:01:A7:A8:D4:6A  ACL MTU: 1021:8  SCO MTU: 64:1
 	UP RUNNING PSCAN 
 	RX bytes:5198 acl:2 sco:0 events:269 errors:0
 	TX bytes:7021 acl:2 sco:0 commands:218 errors:0

** Affects: bluez (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug xenial

** Summary changed:

- Bluetooth signal is unsuably poor
+ Bluetooth signal is unusably poor

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Title:
  Bluetooth signal is unusably poor

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