After upgrading the kernel using software updater today I found that
"hcitools scan" has stopped saying "no such device". However the scan
does not find any bluetooth devices. I tried with a phone and a tablet.
$ uname -a
Linux soni 3.16.0-30-generic #40~14.04.1-Ubuntu SMP Thu Jan 15 17:43:14 UTC
2015 x86_64 x86_64 x86_64
$ sudo dmesg -c > /dev/null
# plug in the BT dongle at this point
$ lsusb | grep "luetooth"
Bus 002 Device 004: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle
(HCI mode)
Bus 001 Device 003: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for
Bluetooth
$ hciconfig
hci0: Type: BR/EDR Bus: USB
BD Address: 00:1B:10:00:2A:EC ACL MTU: 1017:8 SCO MTU: 64:0
UP RUNNING PSCAN
RX bytes:512 acl:0 sco:0 events:23 errors:0
TX bytes:336 acl:0 sco:0 commands:23 errors:0
$ hcitool scan
Scanning ...
$ echo $? # Nothing happened so see if there is error code...
0
$ dmesg
[ 899.894436] usb 2-1.7: new full-speed USB device number 4 using ehci-pci
[ 900.056153] usb 2-1.7: New USB device found, idVendor=0a12, idProduct=0001
[ 900.056158] usb 2-1.7: New USB device strings: Mfr=1, Product=2,
SerialNumber=0
[ 900.056160] usb 2-1.7: Product: Bluetooth V2.0 Dongle
[ 900.056163] usb 2-1.7: Manufacturer: Bluetooth v2.0
-Kedar
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https://bugs.launchpad.net/bugs/1221995
Title:
0a12:0001 Bluetooth Dongle (Cambridge Silicon Radio, Ltd) doesn't work
with 3.11 or 3.13 kernels
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