Comment 5 for bug 1336179

Also, I noticed this entries in dmesg:

[ 25.618865] Bluetooth: Error in firmware loading err = -110,len = 448, size = 4096
[ 25.618873] Bluetooth: Loading patch file failed
[ 25.618879] ath3k: probe of 3-5:1.0 failed with error -110
[ 25.618919] usbcore: registered new interface driver ath3k

So, this could be related to firmware uploading...