Kernel Bug Tracker – Bug 33482
[Regression] Bluetooth pairing does not work anymore in 2.6.39-rc3 (works in 126.96.36.199)
Last modified: 2011-05-14 22:05:32 UTC
Subject : [Regression] Bluetooth pairing does not work anymore in 2.6.39-rc3 (works in 188.8.131.52)
Submitter : Gottfried Haider <email@example.com>
Date : 2011-04-16 16:38
Message-ID : BANLkTi=LvyZ+7BHfVL849pztfvsYaVM4SQ@mail.gmail.com
References : http://marc.info/?l=linux-kernel&m=130297197128328&w=2
This entry is being used for tracking a regression from 2.6.38. Please don't
close it until the problem is fixed in the mainline.
This is probably no real regression.
The Bluetooth KConfig changes in 2.6.39 make it easy to exclude BT_L2CAP from the config when you had it build as a module before and don't know that it's required for pairing devices etc.
Once I figured this out and re-enabled BT_L2CAP everything was working again like before. Shall we close the bug?
Sorry? I think I can reproduce this or similar problem and your explanation does not make it go away.
Here, the device cannot be brought up anymore:
hci0: Type: BR/EDR Bus: USB
BD Address: 00:02:72:01:0E:2D ACL MTU: 192:8 SCO MTU: 64:8
RX bytes:712 acl:0 sco:0 events:24 errors:0
TX bytes:108 acl:0 sco:0 commands:24 errors:0
$ hciconfig hci0 up
Can't init device hci0: Invalid argument (22)
The major difference I could detect so far is that L2CAP and BNEP were modules before and now they are forcibly built-in, and the init order has changed:
[ 8.432938] Bluetooth: Core ver 2.16
[ 8.432992] NET: Registered protocol family 31
[ 8.433036] Bluetooth: HCI device and connection manager initialized
[ 8.433630] Bluetooth: HCI socket layer initialized
[ 8.433667] Bluetooth: L2CAP socket layer initialized
[ 8.433747] Bluetooth: SCO socket layer initialized
[ 8.457962] Bluetooth: Generic Bluetooth USB driver ver 0.6
[ 26.335569] Bluetooth: L2CAP ver 2.15
[ 26.339905] Bluetooth: L2CAP socket layer initialized
[ 26.492119] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 26.496587] Bluetooth: BNEP filters: protocol multicast
[ 26.509742] Bluetooth: RFCOMM TTY layer initialized
[ 26.514265] Bluetooth: RFCOMM socket layer initialized
[ 26.518825] Bluetooth: RFCOMM ver 1.11
[ 26.849430] Bluetooth: SCO (Voice Link) ver 0.6
[ 26.853984] Bluetooth: SCO socket layer initialized
I think you are seeing a different bug.
"hciconfig hci0 up" worked for me at all times, it was only pairing ("bluez-simple-agent hci0 $MAC") that produced the following error message:
"Creating device failed: org.bluez.Error.Failed: Input/output error"
Any my problem was only related to BT_L2CAP not being available - whereas it judging from your dmesg.
On Monday, May 02, 2011, Gottfried Haider wrote:
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=33482
> > Subject : [Regression] Bluetooth pairing does not work anymore in 2.6.39-rc3 (works in 184.108.40.206)
> > Submitter : Gottfried Haider <firstname.lastname@example.org>
> > Date : 2011-04-16 16:38 (15 days old)
> This can be removed from the regression list as it turned out to be
> only a mis-config-uration (oldconfig listed BT_L2CAP as a new config
> option, defaulting to false, when it had been build as a module