Comment # 2 on bug 1163626 from Igor Kuznetsov

Very strange...

[bluetooth]# scan on
Failed to start discovery: org.bluez.Error.NotReady
[CHG] Controller E4:F8:9C:52:F8:4A DiscoverableTimeout: 0x00000000
[CHG] Controller E4:F8:9C:52:F8:4A DiscoverableTimeout: 0x00000000
[CHG] Controller E4:F8:9C:52:F8:4A DiscoverableTimeout: 0x00000000
[CHG] Controller E4:F8:9C:52:F8:4A DiscoverableTimeout: 0x00000000
[CHG] Controller E4:F8:9C:52:F8:4A DiscoverableTimeout: 0x00000000

bluetooth.service - Bluetooth service
     Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; vendor
preset: disabled)
     Active: active (running) since Mon 2020-02-17 20:09:35 +04; 1h 26min ago
       Docs: man:bluetoothd(8)
   Main PID: 1561 (bluetoothd)
      Tasks: 1 (limit: 4915)
     Memory: 2.7M
     CGroup: /system.slice/bluetooth.service
             ������1561 /usr/lib/bluetooth/bluetoothd

������ 17 20:10:37 lnxvrxtosh bluetoothd[1561]: Endpoint registered: sender=:1.40
path=/MediaEndpoint/A2DPSource/sbc
������ 17 20:13:30 lnxvrxtosh bluetoothd[1561]: Endpoint unregistered:
sender=:1.40 path=/MediaEndpoint/A2DPSink/sbc
������ 17 20:13:30 lnxvrxtosh bluetoothd[1561]: Endpoint unregistered:
sender=:1.40 path=/MediaEndpoint/A2DPSource/sbc
������ 17 20:29:31 lnxvrxtosh bluetoothd[1561]: Endpoint registered: sender=:1.40
path=/MediaEndpoint/A2DPSink/sbc
������ 17 20:29:31 lnxvrxtosh bluetoothd[1561]: Endpoint registered: sender=:1.40
path=/MediaEndpoint/A2DPSource/sbc
������ 17 20:29:57 lnxvrxtosh bluetoothd[1561]: Failed to set mode: Blocked
through rfkill (0x12)
������ 17 21:12:39 lnxvrxtosh bluetoothd[1561]: Endpoint unregistered:
sender=:1.40 path=/MediaEndpoint/A2DPSink/sbc
������ 17 21:12:39 lnxvrxtosh bluetoothd[1561]: Endpoint unregistered:
sender=:1.40 path=/MediaEndpoint/A2DPSource/sbc
������ 17 21:34:02 lnxvrxtosh bluetoothd[1561]: Endpoint registered: sender=:1.40
path=/MediaEndpoint/A2DPSink/sbc
������ 17 21:34:02 lnxvrxtosh bluetoothd[1561]: Endpoint registered: sender=:1.40
path=/MediaEndpoint/A2DPSource/sbc

lnxvrxtosh:/home/virex # rfkill 
ID TYPE      DEVICE                 SOFT      HARD
 0 bluetooth Toshiba Bluetooth unblocked unblocked
 1 wlan      phy0              unblocked unblocked
 4 bluetooth hci0                blocked unblocked
lnxvrxtosh:/home/virex # rfkill unblock 4
lnxvrxtosh:/home/virex # rfkill 
ID TYPE      DEVICE                 SOFT      HARD
 0 bluetooth Toshiba Bluetooth unblocked unblocked
 1 wlan      phy0              unblocked unblocked
 4 bluetooth hci0              unblocked unblocked
lnxvrxtosh:/home/virex #

trying to on, but it is switch to another number 

rfkill 
ID TYPE      DEVICE                 SOFT      HARD
 0 bluetooth Toshiba Bluetooth unblocked unblocked
 1 wlan      phy0              unblocked unblocked
 8 bluetooth hci0                blocked unblocked

but after several reboot it is start to work normal.