Hi, This bug has been in the kernel for years and it was posted on kernel bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64671 My exact bluetooth module with IDS is: 0a5c:21b4 Broadcom Corp. BCM2070 Bluetooth 2.1 + EDR on pc startup the bluetooth device is not ready and bluetoothctl doesn't see the controller looking at the dmesg errors I see this line: ``` [ 11.618685] Bluetooth: hci0: command 0x1009 tx timeout ``` There are two ways to workaround this issue: 1- reload the btusb kernel modules: rmmod btusb modprobe btusb This will reset the device and now the controller is up and recognised by bluetoothctl 2- reset the device I used this python script to reset the device: ``` #!/usr/bin/python from usb.core import find as finddev dev = finddev(idVendor=0x0a5c, idProduct=0x21b4) dev.reset() ``` after running this the controller is working and i can connect an pair devices and i see this in the dmesg errors: ``` [ 62.746083] Bluetooth: hci0: unexpected event for opcode 0x1009 ``` Maybe this is a timing issue in which the btusb driver is trying to probe the device before it's ready ?! I hope this can be solved from within the kernel code, I can test any patches and give my feedback. Regards
