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[felipunk <1277871@xxxxxxxxxxxxxxxxxx>]

I have the same thing happening in my T440s running Kubuntu 13.10, is
there anything I can provide for you that can help solving this? I've
installed the version 3.10.27-031027-generic of the kernel and it behave
better for a couple hours, now its doing the same thing bringing down
the hci0 device, one thing that it's better with 3.10 kernel is that
when it gets disconnected the device still shows when running "hciconfig
dev" but when running 3.11 the device is gone!

Let me know if I can help getting something else.

Bye!

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Packages, which is subscribed to bluez in Ubuntu.
https://bugs.launchpad.net/bugs/1277871

Title:
  bluetooth mouse ceases to work

Status in “bluez” package in Ubuntu:
  Confirmed

Bug description:
  After the initial boot, the bluetooth connected mouse is working ok.
  Up to a point where all over a sudden, it stops. The only thing being logged is:

  [ 6089.525351] Bluetooth: hci0 command 0x0c03 tx timeout
  [ 6097.530209] Bluetooth: hci0 sending initial HCI reset command failed (-110)

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: bluetooth (not installed)
  ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10
  Uname: Linux 3.11.0-15-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  Date: Sat Feb  8 14:48:03 2014
  InstallationDate: Installed on 2014-02-07 (0 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: Dell Inc. Latitude E7240
  MarkForUpload: True
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic.efi.signed root=UUID=052bd6e1-db02-4bca-9f9c-d5600c0237e1 ro quiet splash vt.handoff=7
  SourcePackage: bluez
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/05/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0531FD
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd10/05/2013:svnDellInc.:pnLatitudeE7240:pvr01:rvnDellInc.:rn0531FD:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7240
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  hciconfig:
   hci0:	Type: BR/EDR  Bus: USB
   	BD Address: FC:F8:AE:45:3C:05  ACL MTU: 1021:5  SCO MTU: 96:5
   	UP RUNNING PSCAN 
   	RX bytes:148805 acl:9777 sco:0 events:244 errors:0
   	TX bytes:17582 acl:12 sco:0 commands:115 errors:0

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