Nvidia 840M. Acer Aspire E5-571G. Suspend Problem. GPU has fallen off

Dear Sir,

I have already installed the last 375.20 driver in my Ubuntu 16.04 Linux distribution.
Everything is ok, but when laptop goes into suspend mode, at the very moment of waking-up a black screen appears with this text and have to reboot,

151.804334 NVRM: Xid (PCI:0000:03:00): 79, GPU has fallen off the bus.

I have been looking around but no solution at all.

May I ask you to please, help me ?

Many thanks in advance