The laptop is able to suspend. After resuming from suspend, there is simply no display, the screen remains off. Based on all the other answers, I have tried the various Ctrl+Alt+Fn (1 - 12) combinations as well as Ctrl+Alt+Del. There is no terminal, no error message, no nothing. The only thing that does happen is the fans go louder and faster.
The model/make of the laptop is HP 630 Notebook PC.
The solution was to update the BIOS.
The old BIOS which didn't work was version F.19. It worked after updating to version F.39.
If you can't get anything on a screen even after powering off and on, possibly you should try to clear CMOS but this better do in service centre.
If you can see at least BIOS post messages immediately after powering on but then it goes blank screen, this means something wrong with you OS and you should try to boot Ubuntu from Live USB and then recover it.
If you can successfully boot as usual but you have issues only resuming from suspend this is just a bug in kernel or in graphic drivers. You should write a bug report on appropriate bug tracker previously identifying the source of the problem.
I had the same problem. In my case, I discovered a method for this: start swiping the touch pad fully and very fast, immediately after opening the lid.
