Bluetooth adapter not detected

In previous versions (<= Raring) I was able to turn on the bluetooth (on Raring I had to install blueman). Currently my device is not detected. Commands such as `rfkill list`, `hcitool dev`, `lsusb` won't show any bluetooth device.

My laptop is an hp nx7400.

I installed Debian wheezy, just to make sure I am not going crazy. And, yes, on wheezy bluetooth is functional (tested with KDE+bluedevil). Maybe this is related to the kernel/udev versions?

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: bluez 4.101-0ubuntu10
ProcVersionSignature: Ubuntu 3.13.0-11.31-generic 3.13.3
Uname: Linux 3.13.0-11-generic i686
ApportVersion: 2.13.2-0ubuntu5
Architecture: i386
CurrentDesktop: Unity
Date: Sat Feb 22 22:13:17 2014
InstallationDate: Installed on 2014-01-14 (39 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20140113)
InterestingModules: bnep rfcomm bluetooth
MachineType: Hewlett-Packard HP Compaq nx7400 (GF451LA#ABM)
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-11-generic root=UUID=96147aaf-4d58-4669-83a5-18e2f94dbd65 ro quiet splash vt.handoff=7
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/18/2006
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68YGU Ver. F.0A
dmi.board.name: 30A2
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 40.17
dmi.chassis.asset.tag: CNU7111JLR
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68YGUVer.F.0A:bd12/18/2006:svnHewlett-Packard:pnHPCompaqnx7400(GF451LA#ABM):pvrF.0A:rvnHewlett-Packard:rn30A2:rvrKBCVersion40.17:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq nx7400 (GF451LA#ABM)
dmi.product.version: F.0A
dmi.sys.vendor: Hewlett-Packard
hciconfig:

rfkill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no