Hi Daniel,

Thank you for your quick response. Yes, the computer (an embedded device
board on which the said Ubunutu is running) already had Discoverable set
to on (yes) by default. So I did not explicitly set it via your command.
But, just I applied the command. Even now there is no change as to the
detectability. Please see the terminal output below

Another point I just noticed (before running the command) is that if I
am really close to the ubuntu device, then intermittently my android
phone detects it, but then I have to be absurdly close (literally keep
my phone right next to to the device).

***This was never the case**** and I suspect the issue mentioned in my
original post -  "Not enough free handles to register service".


[bluetooth]# show
Controller 00:04:4B:8D:2F:05
        Name: tegra-ubuntu
        Alias: tegra-ubuntu
        Class: 0x200000
        Powered: yes
        Discoverable: yes
        Pairable: yes
        UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
        UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
        UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
        UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
        UUID: Handsfree                 (0000111e-0000-1000-8000-00805f9b34fb)
        UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
        Modalias: usb:v1D6Bp0246d0525
        Discovering: no
[bluetooth]# agent on
Agent registered
[bluetooth]# default-agent 
Default agent request successful
[bluetooth]# scan on
Discovery started
[CHG] Controller 00:04:4B:8D:2F:05 Discovering: yes
[NEW] Device 46:72:B0:23:5F:BD 46-72-B0-23-5F-BD

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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/1825821

Title:
  [Nvidia Tegra] Ubuntu 16.04 : Bluetooth can't be detected by other
  devices

Status in bluez package in Ubuntu:
  Incomplete

Bug description:
  Hi,

  I am running an Ubuntu 16.04 machine. I tried to start the system
  bluetooth through the following steps:

  1. Ensured that bluetooth was unblocked through the command rfkill
  2. Set bluetooth to powered on, agent on, default-agent and scan on through 
bluetootctl

  On completing these steps, Bluetooth icon shows up as active on the
  system, but other devices are unable to scan it and consequently not
  able to connect to it. This Ubuntu does not appear in the list of
  bluetooth devices for other devices' scan.

  3. I ran systemctl status bluetooth

  I am getting the following errors:

  nvidia@tegra-ubuntu:~$ systemctl status bluetooth
  ● bluetooth.service - Bluetooth service
     Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor 
preset: enabled)
     Active: active (running) since Mon 2019-04-22 15:57:21 IST; 10min ago
       Docs: man:bluetoothd(8)
   Main PID: 1087 (bluetoothd)
     Status: "Running"
     CGroup: /system.slice/bluetooth.service
             └─1087 /usr/lib/bluetooth/bluetoothd

  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Error adding Link Loss service
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Not enough free handles to 
register service
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Not enough free handles to 
register service
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Not enough free handles to 
register service
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Current Time Service could not 
be registered
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: gatt-time-server: Input/output 
error (5)
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Not enough free handles to 
register service
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Not enough free handles to 
register service
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: Sap driver initialization 
failed.
  Apr 22 15:57:21 tegra-ubuntu bluetoothd[1087]: sap-server: Operation not 
permitted (1)
  --- 
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: arm64
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 16.04
  InterestingModules: rfcomm bnep bluetooth
  Lspci:
   
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 413c:301a Dell Computer Corp. 
   Bus 001 Device 003: ID 413c:2113 Dell Computer Corp. 
   Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Package: bluez 5.37-0ubuntu5.1
  PackageArchitecture: arm64
  ProcKernelCmdLine: root=/dev/mmcblk0p1 rw rootwait console=ttyS0,115200n8 
console=tty0 OS=l4t fbcon=map:0 net.ifnames=0 memtype=0 video=tegrafb 
no_console_suspend=1 earlycon=uart8250,mmio32,0x03100000 
nvdumper_reserved=0x2772e0000 gpt tegraid=18.1.2.0.0 tegra_keep_boot_clocks 
maxcpus=6 androidboot.serialno=0323117055596 
bl_prof_dataptr=0x10000@0x277240000 sdhci_tegra.en_boot_part_access=1 
root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4
  Tags:  xenial
  Uname: Linux 4.4.38-tegra aarch64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm audio cdrom dialout dip floppy sudo video
  _MarkForUpload: True
  hciconfig:
   hci0:        Type: BR/EDR  Bus: UART
        BD Address: 00:04:4B:8D:2F:05  ACL MTU: 1021:8  SCO MTU: 64:1
        UP RUNNING PSCAN ISCAN 
        RX bytes:794 acl:0 sco:0 events:52 errors:0
        TX bytes:2128 acl:0 sco:0 commands:52 errors:0
  mtime.conffile..etc.bluetooth.main.conf: 2019-03-21T12:36:43.871783

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