Krdytkyu

I've been using a Logitech M720 on my Dell XPS 9370. It has Ubuntu 18.04.1LTS installed.

Before a certain date, the mouse worked fine over Bluetooth. After a recent update (I can't remember which one). Now, the mouse works fine one moment, but is completely unresponsive a moment later. These periods of working/non-working are about equally long, say 10 seconds. I haven't tried any other Bluetooth device with the pc yet, but in Windows (it's dual boot) the mouse works fine.

I tried updating/upgrading to all the newest packages on the system using

apt-get update && apt-get upgrade && apt-get dist-upgrade

The output "dmesg | grep Blue" is the following:

[    6.095068] Bluetooth: Core ver 2.22

[    6.095079] Bluetooth: HCI device and connection manager initialized

[    6.095082] Bluetooth: HCI socket layer initialized

[    6.095083] Bluetooth: L2CAP socket layer initialized

[    6.095086] Bluetooth: SCO socket layer initialized

[    6.241043] Bluetooth: hci0: using rampatch file: qca/rampatch_usb_00000302.bin

Using;

sudo hcidump -x -i hciX

, I can monitor the events of the mouse while it's working. While the mouse is not responding no messages are coming in. These logs are pretty long, so not sure if I should post it too.

Any help is much appreciated!

edit, output of bluetoothctl:

[NEW] Controller 9C:B6:D0:89:9E:BC myhostname-XPS-13-9370 [default]

[NEW] Device EA:5B:72:FC:28:28 M720 Triathlon

[NEW] Primary Service

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service003e

    00010000-0000-1000-8000-011f2000046d

    Vendor specific

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service003e/char003f

    00010001-0000-1000-8000-011f2000046d

    Vendor specific

[NEW] Descriptor

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service003e/char003f/desc0041

    00002902-0000-1000-8000-00805f9b34fb

    Client Characteristic Configuration

[NEW] Primary Service

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c

    0000180a-0000-1000-8000-00805f9b34fb

    Device Information

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c/char0019

    00002a50-0000-1000-8000-00805f9b34fb

    PnP ID

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c/char0017

    00002a28-0000-1000-8000-00805f9b34fb

    Software Revision String

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c/char0015

    00002a26-0000-1000-8000-00805f9b34fb

    Firmware Revision String

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c/char0013

    00002a27-0000-1000-8000-00805f9b34fb

    Hardware Revision String

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c/char0011

    00002a25-0000-1000-8000-00805f9b34fb

    Serial Number String

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c/char000f

    00002a24-0000-1000-8000-00805f9b34fb

    Model Number String

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service000c/char000d

    00002a29-0000-1000-8000-00805f9b34fb

    Manufacturer Name String

[NEW] Primary Service

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service0008

    00001801-0000-1000-8000-00805f9b34fb

    Generic Attribute Profile

[NEW] Characteristic

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service0008/char0009

    00002a05-0000-1000-8000-00805f9b34fb

    Service Changed

[NEW] Descriptor

    /org/bluez/hci0/dev_EA_5B_72_FC_28_28/service0008/char0009/desc000b

    00002902-0000-1000-8000-00805f9b34fb

    Client Characteristic Configuration

[NEW] Device 40:4E:36:A1:DD:42 HTC BS 428FB3

Agent registered

[CHG] Device EA:5B:72:FC:28:28 ServicesResolved: no

[CHG] Device EA:5B:72:FC:28:28 Connected: no

[CHG] Device EA:5B:72:FC:28:28 Connected: yes

[CHG] Device EA:5B:72:FC:28:28 ServicesResolved: yes

[M720 Triathlon]# 

For anyone who has similar problems, I installed TLP power management without any configuration from my side. Disabling power saving for Bluetooth devices in TLP fixed the problem.