Ubuntu – Mouse cursor size behaviour in Gnome Shell

You have installed libinput. It is used instead of xorg-synaptics to manage the touchpad.

Unfortunately current Ubuntu with Unity DE does not have libinput settings GUI by default. unity-control-center can control only of xorg-synapics.

Another option is to uninstall xserver-xorg-input-libinput package and use xserver-xorg-input-synaptics that is installed by default instead.

I too have the MS designer KB and mouse and have been struggling to get them working until I found this nugget which led me to my solution:

You can use /usr/bin/btmon to observe bluetooth traffic in a terminal" $ sudo /usr/bin/btmon

The settings in my /var/lib/bluetooth/0C:8B:FD:A3:A7:81/C9:DE:3D:0B:5D:AA/info file did not correlate to the info given above so I wondered why? Both devices work fine with a Win10 installation so it cannot be hardware.

Playing with /etc/bluetooth/main.conf I have ended up with these changes to the supplied default settings:

ControllerMode = dual
FastConnectable = true
AutoEnable=true

I believe it was the "FastConnectable" set to true that did the trick.

Restart the bluetooth daemon:

$ sudo systemctl restart bluetooth

Then launch the bluetooth settings window from the panel and I was able to pair and connect first the mouse and then the keyboard.

Both of which are finally now working as I type this.

Here are the settings for the controller:

# cat /var/lib/bluetooth/0C:8B:FD:A3:A7:81/settings
[General]
Discoverable=true
DiscoverableTimeout=0

Here are the settings from the device info files:

# cat /var/lib/bluetooth/0C:8B:FD:A3:A7:81/C9:DE:3D:0B:5D:AA/info
Name=Designer Mouse
Appearance=0x03c2
AddressType=static
SupportedTechnologies=LE;
Trusted=true
Blocked=false
Services=00001800-0000-1000-8000-00805f9b34fb;00001801-0000-1000-8000-00805f9b34fb;0000180a-0000-1000-8000-00805f9b34fb;0000180f-0000-1000-8000-00805f9b34fb;00001812-0000-1000-8000-00805f9b34fb;

[IdentityResolvingKey]
Key=FD8B335D5C060F854D176DB83B8D30C2

[LocalSignatureKey]
Key=46E81FBAC8BF9D08E2D0EB4E2B18BDD9
Counter=0
Authenticated=false

[LongTermKey]
Key=4654312509FC03FE50E4F4733939F465
Authenticated=0
EncSize=16
EDiv=48958
Rand=16834402867800600456

[DeviceID]
Source=2
Vendor=1118
Product=2053
Version=272

[ConnectionParameters]
MinInterval=6
MaxInterval=6
Latency=60
Timeout=300

# cat /var/lib/bluetooth/0C:8B:FD:A3:A7:81/F6:E0:5B:DF:78:BC/info
[General]
Name=Designer Keyboard
Appearance=0x03c1
AddressType=static
SupportedTechnologies=LE;
Trusted=true
Blocked=false
Services=00001800-0000-1000-8000-00805f9b34fb;00001801-0000-1000-8000-00805f9b34fb;0000180a-0000-1000-8000-00805f9b34fb;0000180f-0000-1000-8000-00805f9b34fb;00001812-0000-1000-8000-00805f9b34fb;

[ConnectionParameters]
MinInterval=12
MaxInterval=12
Latency=30
Timeout=300

[IdentityResolvingKey]
Key=4F6C4BBD104ADD361420130F8EDAC946

[LocalSignatureKey]
Key=0EC3A10834025CD3297D8E45EAD7EB00
Counter=0
Authenticated=true

[LongTermKey]
Key=AF3871A1D67F898120814603BF8C77D3
Authenticated=1
EncSize=16
EDiv=16328
Rand=4879611362371170586

Thanks everyone!