Some evidence about this: happens if you install nvidia-340.52 driver on ubuntu 16.04 and try to modify time settings (for example) without rebooting.
uname -a:
Linux pc 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Some evidence about this: happens if you install nvidia-340.52 driver on ubuntu 16.04 and try to modify time settings (for example) without rebooting.
uname -a:
Linux pc 4.4.0-36-generic #55-Ubuntu SMP Thu Aug 11 18:01:55 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux