Ubuntu Gnome 15.10 doesn't suspend

гm having an issue with Убунту Гноме 15.10 (also had the same issue with 15.04 before making в clean install of 15.10).

When closing the laptop сражение, the computer shuts down instead of suspending. EDIT: It seems to suspend properly, but shuts down when trying to обобщает.

The tweak-tool settings пахал set to suspend whether power is connected or not.

гm not sure what relevant information to provide, but гm using в "Lenovo Flex 2" with nvidia graphics card драйверы, не external monitors connected. (Сходный гve read about problems with external monitors)

Any help would be appreciated, thank you.