Same problem with an old Dell Inspiron 1545 recently upgraded to Ubuntu 18.04 (4.15.0-22-generic). After disabling Bluetooth in the Bios and removing package Bluez, system is usable again.
Same problem with an old Dell Inspiron 1545 recently upgraded to Ubuntu 18.04 (4.15.0- 22-generic) . After disabling Bluetooth in the Bios and removing package Bluez, system is usable again.