[Bug 268502] Re: Bluetooth doesn't work (hci_cmd_task: hci0 command tx timeout)

[Brian Rogers]

Well it turns out it's not as simple as just a bad commit. The problem
is with the newer btusb driver that replaced hci_usb by default in
2.6.27. It looks like that newer driver never worked correctly with
certain Bluetooth dongles.

** Description changed:

  Bluetooth doesn't work for at least the following devices:
  ID 1131:1001 Integrated System Solution Corp. KY-BT100 Bluetooth Adapter
  ID 1131:1004 Integrated System Solution Corp. Bluetooth Device
  ID 2001:f111 D-Link Corp. [hex] DBT-122 Bluetooth adapter
  ID 0a5c:200a Broadcom Corp. Bluetooth dongle
  
- The problem started somewhere between 2.6.26 and 2.6.27. It hasn't been
- fixed upstream as of v2.6.29-rc3.
+ They don't work properly with the newer btusb driver, which replaced
+ hci_usb by default in 2.6.27. This hasn't been fixed upstream as of
+ v2.6.29-rc3.
  
  Original message below:
  
  Association with Bluetooth works using kernel 2.6.26, since the updates
  to 2.6.27 (both -1 and -2) association fails. I can scan and see
  bluetooth devices but not pair.
  
  Using my phone, I start the association process, the phone asks for a
  passkey, and in 2.6.26 the popup window appears normally allowing me to
  enter the passkey. In 2.6.27 the dialog box never appears.
  
  If I use hcitool:
  
  :~$ sudo hcitool cc 00:1B:59:96:A6:DD
  :~$ sudo hcitool auth 00:1B:59:96:A6:DD
  HCI authentication request failed: Connection timed out
  
  the dialog box appears very very briefly then vanishes.
  
  dmesg shows a couple of problems:
  
  [25791.306170] btusb_intr_complete: hci0 urb ffff88004dd0fb40 failed to resubmit (19)
  [25791.315446] btusb_send_frame: hci0 urb ffff880048542840 submission failed
  
  and the syslog shows that there was an attempt to associate:
  
  Sep 23 08:16:59 charlie hcid[5903]: link_key_request (sba=00:11:67:9C:59:B5, dba=00:1B:59:96:A6:DD)
  Sep 23 08:16:59 charlie hcid[5903]: pin_code_request (sba=00:11:67:9C:59:B5, dba=00:1B:59:96:A6:DD)

-- 
Bluetooth doesn't work (hci_cmd_task: hci0 command tx timeout)
https://bugs.launchpad.net/bugs/268502
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