my case with updated trusty:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3342 tai2718+ 20 0 1115404 13620 5244 R 11.1 0.4 58:42.54 nautilus 3018 tai2718+ 20 0 5605484 2.938g 3340 D 7.4 82.5 353:41.47 hud-service
I only launched the updater to update the system and leave the machine there after the updating installation.
my case with updated trusty:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3342 tai2718+ 20 0 1115404 13620 5244 R 11.1 0.4 58:42.54 nautilus
3018 tai2718+ 20 0 5605484 2.938g 3340 D 7.4 82.5 353:41.47 hud-service
I only launched the updater to update the system and leave the machine there after the updating installation.