This bug still exists in Ubuntu 12.04 LTS and (re)reported in Red Hat
Bugzilla's as bug 749366, so I believe we need a new bug report to get
a fix for this into a 12.04.x point release?
If Andrei's patch to increase bitpool in bluetooth daemon fixes this
problem then the problem _is_ in bluez and changing the settings bluez
uses via options to hciconfig (that aren't documented in it's man page)
is only a workaround.
I reproduced this choppy audio playback during mouse movements with the
combination of:
* Kernel: 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012 x86_64
* Bluez: 4.98-2ubuntu7
* Jabra BT620s
* Logitech Bluetooth Mouse M555b
* Onboard Bluetooth in a VAIO-Z2 (connected internally via USB): ID 8086:0189
Intel Corp.
Disconnecting my devices, then following Jen's instructions in comment
#23 and re-pairing my devices worked for me as a workaround for this
issue in bluez's link management. I will try using the uDev rule to make
this workaround permanent across reboots. I've since streamed DI.fm
without stutter for several hours whilst using my M555b mouse at same
distance from the laptop as my Jabra bluetooth headset.
After applying the hciconfig changes, and reconnecting both headset &
mouse (as only devices connected) my "hciconfig -a" output is:
hci0: Type: BR/EDR Bus: USB
BD Address: 88:53:2E:29:C7:27 ACL MTU: 310:10 SCO MTU: 64:8
UP RUNNING PSCAN ISCAN
RX bytes:10740963 acl:308181 sco:0 events:784453 errors:0
TX bytes:226808075 acl:779584 sco:0 commands:100 errors:0
Features: 0xff 0xff 0x8f 0xfe 0x9b 0xff 0x59 0x87
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: HOLD SNIFF PARK
Link mode: ACCEPT MASTER
Name: 'z2-0'
Class: 0x7e0100
Service Classes: Networking, Rendering, Capturing, Object Transfer,
Audio, Telephony
Device Class: Computer, Uncategorized
HCI Version: 3.0 (0x5) Revision: 0x1b07
LMP Version: 3.0 (0x5) Subversion: 0x0
Manufacturer: Intel Corp. (2)
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https://bugs.launchpad.net/bugs/424215
Title:
Bluetooth mouse usage makes A2DP audio stutter
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