Let's get the full make and model card to see what's up. And yes, HDMI to VGA adapters are troublesome. I never troubleshoot those. I remove them.
Just bought a new computer from Asus with GTX960. When I was gonna start using it I realised it didn't have a VGA-port to the graphic card. My screen is a couple of years old and got VGA-cord. So I went to buy and HDMI to VGI-adapter so I could use the computer without having to buy a new screen.
It worked fine, but when I restarted the computer the resolution changed and when I opened certain programs like google chrome, the screen lost signal to the computer even though computer was still running. Then I restarted the computer and resolution was back to normal and I could open any program without screen loosing signal to computer.
But then when I started computer next day same thing occurs so I just restart computer and it works fine.
Now like 6 days later, the screen is loosing signal to the computer all the time when I open certain programs. Restarting computer doesn't solve problem.
So I'm hoping someone can help me determine if this happens because of the the HDMI to VGA-adapter or because of the graphic card isn't working properly.
Sorry for bad english. (I'm not a native speaker.)