First ensure you don't have 'tlp' installed. Second, I can only answer by Googling. Maybe changing your kernel command line to disable autosuspend of USB devices:
https://www.kernel.org/doc/html/v4.16/driver-api/usb/power- management.html ** Package changed: bluez (Ubuntu) => linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1801642 Title: Bluetooth mouse sleeps after 5 seconds of inactivity To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1801642/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
