1. If you have 'tlp' installed then please try removing that.

2. If #1 has not solved the problem then please install 'powertop'. Now run:
   sudo powertop
and keep pressing Tab till you reach the "Tunables" section. Find your mouse in 
that list ("Autosuspend for USB device..."). Does it show a "Good" or "Bad" 
value?


** Changed in: bluez (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1801642

Title:
  Bluetooth mouse sleep after 5 seconds of inactivity

Status in bluez package in Ubuntu:
  Incomplete

Bug description:
  I'm having bluetooth mouse lag issue. After leaving it stationary for
  5 seconds, I have to move it for 2 seconds before the pointer starts
  moving.

  I recently upgraded to Cosmic 3 days ago (from Bionic). There was no
  issue in the first 3 days, including after suspend/restart/shutdown.
  This issue only appears starting today.

  I tried:
  1. Running 'bluetoothctl' and then 'scan off'. The command failed to run with 
'Failed to stop discovery: org.bluez.Error.Failed'.
  2. modprobe -r btusb, then modprobe it again.
  3. sudo sh -c 'echo N > /sys/module/drm_kms_helper/parameters/poll'
  4. Disabling wifi.

  $ apt-cache policy bluez
  5.50-0ubuntu1

  $uname -a; lspci -nnk | grep -iA2 net; lsusb; dmesg | grep -i bluetooth; 
dmesg | grep -i firmware; lsmod | grep bluetooth
  4.18.0-10-generic #11
  02:00.0 Network controller [0280]: Intel Corporation Wireless 7260 
[8086:08b1] (rev 73)
        Subsystem: Intel Corporation Dual Band Wireless-N 7260 [8086:4460]
        Kernel driver in use: iwlwifi
  03:00.1 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. 
RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 12)
        Subsystem: Dell RTL8111/8168/8411 PCI Express Gigabit Ethernet 
Controller [1028:05f9]
        Kernel driver in use: r8169
        Kernel modules: r8169
  Bus 001 Device 002: ID 8087:8000 Intel Corp. 
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 003 Device 003: ID 17e9:4301 DisplayLink 
  Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 002 Device 047: ID 04f3:0206 Elan Microelectronics Corp. 
  Bus 002 Device 006: ID 8087:07dc Intel Corp. 
  Bus 002 Device 034: ID 0461:4d51 Primax Electronics, Ltd 0Y357C PMX-MMOCZUL 
(B) [Dell Laser Mouse]
  Bus 002 Device 118: ID 0853:0132 Topre Corporation 
  Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  [  287.361153] hid-generic 0005:046D:B012.0005: input,hidraw2: BLUETOOTH HID 
v0.14 Keyboard [MX Master] on FC:F8:AE:33:C7:31
  bluetooth             548864  33 btrtl,btintel,btbcm,bnep,btusb,rfcomm
  ecdh_generic           24576  2 bluetooth

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: bluez 5.50-0ubuntu1
  ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
  Uname: Linux 4.18.0-10-generic x86_64
  ApportVersion: 2.20.10-0ubuntu13
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Mon Nov  5 13:40:01 2018
  InstallationDate: Installed on 2018-07-08 (119 days ago)
  InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 
(20180426)
  InterestingModules: rfcomm bnep btusb bluetooth
  MachineType: Dell Inc. Inspiron 7537
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-10-generic 
root=/dev/mapper/ubuntu--mate--vg-root ro ipv6.disable=1 quiet splash 
i915.enable_psr=0
  SourcePackage: bluez
  UpgradeStatus: Upgraded to cosmic on 2018-11-02 (3 days ago)
  dmi.bios.date: 10/31/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 07PF9F
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: 
dmi:bvnDellInc.:bvrA05:bd10/31/2013:svnDellInc.:pnInspiron7537:pvr:rvnDellInc.:rn07PF9F:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.family: Shark Bay ULT
  dmi.product.name: Inspiron 7537
  dmi.product.sku: Inspiron 7537
  dmi.sys.vendor: Dell Inc.
  hciconfig:
   hci0:        Type: Primary  Bus: USB
        BD Address: FC:F8:AE:33:C7:31  ACL MTU: 1021:5  SCO MTU: 96:5
        UP RUNNING 
        RX bytes:2380 acl:32 sco:0 events:208 errors:0
        TX bytes:28560 acl:29 sco:0 commands:170 errors:0

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