Smplayer shutting down system

After an hour, using smplayer my system shuts down.
I can use vlc in win 7 and no problem.
Any ideas gratefully received

da kiwi

Are you sure that the system isn't going into suspend or hibernate mode instead? This sounds like a power management issue.

Have you tried this with VLC on Ubuntu MATE?

On the other hand, maybe you're asking this question for SMPlayer on Windows 7... :rofl:

Go to Power settings and check if your system isn't going to sleep because those settings instead. Or, using smplayer try to move your mouse every half an hour or so and see if that helps.

Also try to install Caffeine. Caffeine is a status bar application able to temporarily prevent the activation of both the screensaver and the "sleep" powersaving mode.

have tried several versions of Ubuntu-mate from 20.04 onward. Same thing happens. I suspect it is my NVIDIA gtx card that is the problem but can not find a fix. cheers