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[Gabriele Santilli <santilli.gabriele@xxxxxxxxx>]

I have a possibly related problem. The headset worked fine on 13.10 but
now simply disconnects after a few seconds on 14.04.

Jul 29 13:46:22 imac kernel: [ 9194.185587] Bluetooth: Unexpected continuation frame (len 0)
Jul 29 13:46:23 imac kernel: [ 9194.269541] Bluetooth: Unexpected continuation frame (len 0)
Jul 29 13:46:23 imac kernel: [ 9194.594437] Bluetooth: Unexpected continuation frame (len 0)
Jul 29 13:46:23 imac bluetoothd[791]: /org/bluez/791/hci0/dev_00_23_7F_B4_82_57/fd0: fd(24) ready
Jul 29 13:46:28 imac bluetoothd[791]: Audio connection got disconnected
Jul 29 13:46:28 imac kernel: [ 9199.993603] Bluetooth: Unexpected continuation frame (len 0)
Jul 29 13:46:28 imac kernel: [ 9199.997737] Bluetooth: Unexpected continuation frame (len 0)
Jul 29 13:46:41 imac kernel: [ 9213.037178] Bluetooth: Unexpected continuation frame (len 0)
Jul 29 13:46:42 imac kernel: [ 9213.298044] Bluetooth: Unexpected continuation frame (len 0)
Jul 29 13:47:21 imac kernel: [ 9252.736140] Bluetooth: hci0 SCO packet for unknown connection handle 6
Jul 29 13:47:21 imac kernel: [ 9252.736147] Bluetooth: hci0 SCO packet for unknown connection handle 6
Jul 29 13:47:21 imac kernel: [ 9252.736149] Bluetooth: hci0 SCO packet for unknown connection handle 6
Jul 29 13:46:59 imac bluetoothd[791]: Audio connection got disconnected
Jul 29 13:49:26 imac bluetoothd[791]: Unable to get service record: Connection timed out (110)

Any ideas on what I can test?

** Tags added: apport-collected trusty

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https://bugs.launchpad.net/bugs/898347

Title:
  syslog flooded with "hci_scodata_packet: hci0 SCO packet for unknown
  connection handle"

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  I am experiencing unstable bluetooth connections between a USB
  bluetooth dongle and headset.  I get a ton of lines like

  Dec  1 04:09:51 localhost kernel: [  264.372205] hci_scodata_packet:
  hci0 SCO packet for unknown connection handle 65261

  in syslog.  The bluetooth connection also usually breaks down about 10
  seconds into a Skype call.  I cannot know if the two phenomena are
  actually related.

  Dec  1 04:09:52 localhost kernel: [  264.392198] hci_scodata_packet: hci0 SCO packet for unknown connection handle 65072
  Dec  1 04:09:52 localhost kernel: [  264.402199] hci_scodata_packet: hci0 SCO packet for unknown connection handle 65493
  Dec  1 04:10:26 localhost bluetoothd[1756]: Audio connection got disconnected
  Dec  1 04:10:26 localhost pulseaudio[1936]: ratelimit.c: 4802 events suppressed
  Dec  1 04:10:35 localhost pulseaudio[1936]: ratelimit.c: 428 events suppressed

  I believe this is a Ubuntu-induced regression, I was unable to
  reproduce the problem with a mainline kernel today.

  confirmed affected: vmlinuz-2.6.32-35-generic (latest lucid kernel)
  confirmed affected: vmlinuz-3.0.0-13-generic
  apparently unaffected: vmlinuz-3.2.0-999-generic from today (or rather Nov 30th)

  FWIW, the mainline kernel seems to have a stable bluetooth connection
  but syslog gets flooded there as well.

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