missing max_match_rules_per_connection

Hi,

I'm currently trying to debug why my Bluetooth Barcode scanner (emulating a keyboard) with a USB bluetooth dongle does not work anymore with my 18.04, can't connect it anoymore (it used to work at lease occasionally months ago.) It pairs, but can't be connected as a HID.

One of the problems was that error message in /var/log/syslog:

Connection ":1.182" is not allowed to add more match rules (increase limits in configuration file if required; max_match_rules_per_connection=2048)

After adding

  <limit name="max_replies_per_connection">1024</limit>
  <limit name="max_match_rules_per_connection">2048</limit>

to the busconfig struct in /etc/dbus-1/system.d/bluetooth.conf

at least this error message vanished (while others persist, still does not work).

However, this should be in /etc/dbus-1/system.d/bluetooth.conf as delivered from the package and not require the user to debug and change.

regards

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: bluez 5.48-0ubuntu3.1
ProcVersionSignature: Ubuntu 4.15.0-50.54-generic 4.15.18
Uname: Linux 4.15.0-50-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun May 26 14:37:28 2019
InstallationDate: Installed on 2018-06-09 (350 days ago)
InstallationMedia: Lubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: Medion G24
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-50-generic root=UUID=a3f06afa-8405-4064-8044-0a9e1b4c19c8 ro quiet splash vt.handoff=1
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/12/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: H61TIW08.111
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: H61H2-TI2
dmi.board.vendor: Medion
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Medion
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrH61TIW08.111:bd10/12/2012:svnMedion:pnG24:pvr1.0:rvnMedion:rnH61H2-TI2:rvr1.0:cvnMedion:ct3:cvr1.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: G24
dmi.product.version: 1.0
dmi.sys.vendor: Medion
hciconfig:
 hci0: Type: Primary Bus: USB
  BD Address: 00:1A:7D:DA:71:13 ACL MTU: 310:10 SCO MTU: 64:8
  UP RUNNING PSCAN
  RX bytes:2128 acl:0 sco:0 events:126 errors:0
  TX bytes:4712 acl:0 sco:0 commands:106 errors:0
mtime.conffile..etc.dbus-1.system.d.bluetooth.conf: 2019-05-26T14:29:51.468868