Lag when using Bluetooth Mouse

After the latest Ubuntu update (using 19.04) I get an extraordinary lag when using my Logitech M720 mouse connected via Bluetooth.

When using the USB dongle it works flawless.

Any ideas on why this might have occurred? (tried removing it, pairing it again and so forth)

3 Answers

After trying to downgrade the bluetooth package to see if that made a difference, I decided/realized that while it may have improved somewhat, it did not fix the issue. Continued researching and found: .

Suggestion is:

echo "options iwlwifi bt_coex_active=0" | sudo tee /etc/modprobe.d/iwlopt.conf

Then restart.

Seems to be working substantially better

I am using a Logitech MX Ergo on Pop OS 19.10 (running on a ThinkPad E15) and

echo "options iwlwifi bt_coex_active=0" | sudo tee /etc/modprobe.d/iwlopt.conf

solved it for me. It improved both issues that I was experiencing:

• an occasional lag of around 0.5 seconds where the pointer completely stopped moving,
• the mouse pointer generally became much more fluid, there were many micro-stutters before.

Thanks to BHuber!

The above workaround worked for me for a while, but, few days ago, my mouse started to lag again.

I found this tutorial, that seems to work.

In resume:

1. Find the address of your mouse:

bluetoothctl devices | cut -f2 -d' ' | while read uuid; do bluetoothctl info $uuid; done|grep -e "Device\|Connected\|Name"

2. Edit file:

sudo nano /var/lib/bluetooth/<you mouse address>/info

3. Change the MinInterval and MaxInterval. I changed to 5, you may want to play with numbers here.
4. Restart Bluetooth adapte:

rfkill block bluetooth
rfkill unblock bluetooth

I hope it helps.