Issues with Bluetooth Mouse in Ubuntu 20.04

I've got a Logitech V270 bluetooth mouse that has worked fine in the past with previous versions of Ubuntu (and other flavours of Linux, and [even] Windows). However, when I've paired it with my HP Elitebook 850 G6 running Ubuntu 20.04, the mouse stops moving the cursor when I leave it for a few seconds. Sometimes a click will wake the mouse, other times it needs a scroll on the wheel, but if I can wake it it works perfectly ... until I again leave it to type for a few seconds.

To be fair, I've never used the mouse with this computer before, so I have no idea if it would happen under Windows, but it worked perfectly with my other HP Elitebook 850 G3 running Ubuntu 16.04.

If anyone has any ideas where I could start looking at, I'd be much appreciative :)

And if this doesn't work do the following:

Type:

sudo nano /etc/default/grub

Completely replace line:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" 

With:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash btusb.enable_autosuspend=n usbcore.autosuspend=-1 usbcore.autosuspend_delay_ms=-1"

Ctrl+X for saving.

Then type:

sudo update-grub

A solution similar to that of mathias worked for me:

sudo nano /etc/default/grub

Add "btusb.enable_autosuspend=0" to the GRUB_CMDLINE_LINUX_DEFAULT line. Ctrl+X to save.

sudo update-grub