En Thinkpad T430 con controlador BCM20702A0

[Miguel]

loa dispositivos se intentan conectar y se conectan/desconectan continuamente. Se hace inutilizable el bluetooth.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: bluez 5.48-0ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 30 13:26:49 2018
InstallationDate: Installed on 2018-04-27 (2 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: LENOVO 2349I62
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=b9f1f5f8-77c7-404e-92e8-a58f7bd5fa9e ro quiet splash vt.handoff=1
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/25/2017
dmi.bios.vendor: LENOVO
dmi.bios.version: G1ETB4WW (2.74 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2349I62
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG1ETB4WW(2.74):bd09/25/2017:svnLENOVO:pn2349I62:pvrThinkPadT430:rvnLENOVO:rn2349I62:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T430
dmi.product.name: 2349I62
dmi.product.version: ThinkPad T430
dmi.sys.vendor: LENOVO
hciconfig:
 hci0: Type: Primary Bus: USB
  BD Address: 74:E5:43:C5:85:87 ACL MTU: 1021:8 SCO MTU: 64:1
  UP RUNNING PSCAN ISCAN
  RX bytes:1196 acl:0 sco:0 events:88 errors:0
  TX bytes:4095 acl:0 sco:0 commands:86 errors:0

[Daniel van Vugt (vanvugt)]

Looks like the problem may be:

abr 30 13:11:02 miguel-ubuntu kernel: bluetooth hci0: Direct firmware load for brcm/BCM20702A1-0a5c-21e6.hcd failed with error -2
abr 30 13:11:02 miguel-ubuntu kernel: Bluetooth: hci0: BCM: Patch brcm/BCM20702A1-0a5c-21e6.hcd not found

abr 30 13:12:15 miguel-ubuntu kernel: bluetooth hci0: Direct firmware load for brcm/BCM20702A1-0a5c-21e6.hcd failed with error -2
abr 30 13:12:15 miguel-ubuntu kernel: Bluetooth: hci0: BCM: Patch brcm/BCM20702A1-0a5c-21e6.hcd not found

[Daniel van Vugt (vanvugt)]

The problem seems to be missing firmware for your bluetooth chip. The kernel is trying to load it and can't find it. Because package 'linux-firmware' is missing those files.

This is very similar to:
https://bugzilla.kernel.org/show_bug.cgi?id=99481
https://bugzilla.kernel.org/show_bug.cgi?id=112671

And see also:
http://askubuntu.com/a/632348/167850

[Seth Forshee (sforshee)]

I'm afraid that the firmware files just look to be pulled out of Windows drivers downloaded from arbitrary download sites. I'd be hesitant to stick those into our linux-firmware package in any case, and without a license which allows us to redistribute the files we simply cannot distribute them in Ubuntu.