On this system, it seems that reboot could fix it temporarily. And it always
not working with cold boot.
This could be probably an issue with Bluetooth under USB 3.0 hub
ubuntu@201401-14508:~$ lsusb -t
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/10p, 480M
|__ Port 2: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 4: Dev 3, If 0, Class=Video, Driver=uvcvideo, 480M
|__ Port 4: Dev 3, If 1, Class=Video, Driver=uvcvideo, 480M
|__ Port 9: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 10: Dev 5, If 0, Class=Wireless, Driver=, 12M
|__ Port 10: Dev 5, If 1, Class=Wireless, Driver=, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
However, running sudo apt-get dist-upgrade (3.16.0-39.53) could solve
this, I will mark this as Fix-released.
** Changed in: linux-lts-utopic (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1478769
Title:
[Dell Inspiron 3048] Atheros Bluetooth [0fc3:e005] does not work with
14.04.2 stock image
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