Bluetooth printing does not work

[Till Kamppeter]

I have applied the workaround of bug 1070770, running bluetoothd under valgrind to prevent it from crashing. See

https://wiki.ubuntu.com/Nexus7/UsingTheDevice#Stabilizing_the_Bluetooth_stack

After successfully connecting my Bluetooth keyboard I tried to connect with a Bluetooth printer, the Photosmart Premium C309g-m. To do so, the "bluetooth" CUPS backend needs to detect the printer. On a standard Intel-based computer I get

till@till:~$ /usr/lib/cups/backend/bluetooth
direct bluetooth://002655096A9C "Photosmart Premium C309g-m" "Photosmart Premium C309g-m (Bluetooth)"
till@till:~$

On the Nexus 7 the same call of the bluetooth backend does not show any answer and never exits, probably hanging during the communication with the printer.

Using the bluez-tools on the Nexus 7 I get:

ubuntu@nexus7-pyongyangs:~$ bt-adapter -d
Searching...

[00:26:55:09:6A:9C]
  Name: (null)
  Alias: 00-26-55-09-6A-9C
  Address: 00:26:55:09:6A:9C
  Icon: printer
  Class: 0x140680
  LegacyPairing: 0
  Paired: 0
  RSSI: -65

Done
ubuntu@nexus7-pyongyangs:~$ sudo bt-device -c 00:26:55:09:6A:9C
[sudo] password for ubuntu:
Connecting to: 00:26:55:09:6A:9C
Agent registered
Error: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
ubuntu@nexus7-pyongyangs:~$

The error message of the second command only showed up after waiting some seconds.

[Till Kamppeter (till-kamppeter)]

An additional remark: THe attempt to connect to the printer via the "bt-device -c ..." command makes bluetoothd crash.

[Chris Wayne (cwayne)]

Just adding a note here that since Bluetooth is not yet officially working on the Nexus 7, I am going to wait to try and reproduce until we have an official fix. I'm a bit concerned about testing with such a workaround.

[Mathieu Trudel-Lapierre (cyphermox)]

Chris, is this depending on a kernel fix or does it need an actual bluez stack update? Can you link the kernel bug if it's a kernel issue?

Triaging to importance Medium as suggested by Robert Park; I think bluetooth should remain as a fairly high priority since it affects the usefulness of the Nexus as a portable computer. Using bluetooth certainly beats lugging around countless cables for the tablet, and when using OTG you can't charge...

[Mathieu Trudel-Lapierre (cyphermox)]

Ah, I meant this to remain at priority High :D

[Tony Espy (awe)]

Updated the bluez task to WontFix, as this is an old image, with an unsupported version of bluez ( eg. 4.x ) and there's no plans to fix this.