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On 2018-10-17T15:57:39+00:00 Sergio Callegari wrote:

Description:
The fault seems to be on the Libreoffice application running on the computer, 
not on the android impress remote app.

Running libreoffice, the computer reports a bluetoothd error on syslog,
namely

bluetoothd[1491]: RFCOMM server failed for LibreOffice Impress Remote:
rfcomm_bind: Address already in use (98)

After that the remote handset cannot connect via bluetooth to LibO even
if the the bluetooth adapters in the computer and the handset are
paired.

The issue appears in the bug trackers of both Ubuntu and Fedora and
regards Ubuntu 18.04 and Fedora 27.

I am 100% sure that in the past the impress remote was working via
bluetooth on the same hardware (both computer and handset).

It is unclear to me if the issue is with the bluetooth stack of recent
linux distros (bluez? kernel?) or if something has changed in it and
LibO is trying to still use it in some old way that is now wrong.

The issue is now present using any LibO version from 5.4 to 6.1.

See https://bugzilla.redhat.com/show_bug.cgi?id=1581879
and https://bugs.launchpad.net/bugs/1798400

Steps to Reproduce:
See description

Actual Results:
See description

Expected Results:
See description


Reproducible: Always


User Profile Reset: No


Additional Info:
[Information automatically included from LibreOffice]
Locale: en-US
Module: StartModule
[Information guessed from browser]
OS: Linux (All)
OS is 64bit: yes

Reply at:
https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1798400/comments/4


** Changed in: df-libreoffice
       Status: Unknown => New

** Changed in: df-libreoffice
   Importance: Unknown => Medium

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to bluez in Ubuntu.
https://bugs.launchpad.net/bugs/1798400

Title:
  Regression: cannot use impress remote over bluetooth with ubuntu
  bionic

Status in LibreOffice:
  New
Status in bluez package in Ubuntu:
  Confirmed
Status in libreoffice package in Ubuntu:
  Confirmed
Status in linux package in Ubuntu:
  Confirmed
Status in libreoffice package in Fedora:
  Unknown

Bug description:
  Trying to use the impress remote
  (https://wiki.documentfoundation.org/Impress_Remote) over bluetooth
  with libreoffice over ubuntu bionic fails.

  The handset errors out that it cannot connect with Libreoffice on the
  computer even if the bluetooth adapter on the handset and on the
  computer are correctly paired.

  This does not seem to be an issue in the Libreoffice or in the impress
  remote code:

  - I have tested also past LibO versions
  - The Impress remote codebase has not changed recently

  This used to work on the same hardware (headset and laptop) with
  ubuntu 16.04.

  Hence the issue seems to be in a regression in the ubuntu bluetooth
  stack.

  To replicate:

  1) Install Libreoffice on Ubuntu bionic (either from the ubuntu repo
  or with the deb packages from the document fundation)

  2) Assure that your computer has bluetooth

  3) Install impress remote on an android handset (either from the play
  store of via fdroid)

  4) Assure that "remote control" is enabled in impress
  Tools>Options>Impress>General

  5) Pair the bluetooth adapters in the laptop and in the computer

  6) Open a presentation on the laptop

  7) Open the remote on the handset, got to the bluetooth pane see the
  computer there, touch it

  8) See the impress remote erroring out

  Most likely you will also get a bluetooth error on dmesg

  RFCOMM server failed for LibreOffice Impress Remote: rfcomm_bind:
  Address already in use (98)

  Same issue was reported for fedora

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: bluez 5.48-0ubuntu3.1
  ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
  Uname: Linux 4.15.0-36-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.4
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Wed Oct 17 16:57:29 2018
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-12-12 (1769 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 
(20131016.1)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: Notebook W740SU
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-36-generic 
root=/dev/mapper/zagar_ssd--vg-root ro quiet splash 
resume=/dev/zagar_ssd-vg/swap_1 acpi_backlight=vendor vt.handoff=1
  SourcePackage: bluez
  UpgradeStatus: Upgraded to bionic on 2018-06-08 (131 days ago)
  dmi.bios.date: 10/02/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: W740SU
  dmi.board.vendor: Notebook
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: Notebook
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd10/02/2013:svnNotebook:pnW740SU:pvrNotApplicable:rvnNotebook:rnW740SU:rvrNotApplicable:cvnNotebook:ct9:cvrN/A:
  dmi.product.family: Not Applicable
  dmi.product.name: W740SU
  dmi.product.version: Not Applicable
  dmi.sys.vendor: Notebook
  hciconfig:
   hci0:        Type: Primary  Bus: USB
        BD Address: 00:C2:C6:1A:28:71  ACL MTU: 310:10  SCO MTU: 64:8
        UP RUNNING PSCAN ISCAN 
        RX bytes:245088 acl:15156 sco:0 events:1266 errors:0
        TX bytes:15571 acl:402 sco:1 commands:131 errors:0

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