I got Plymouth to work on Mint 13 (64 bit) when booting and shutting down and I was wondering if Plymouth is supposed to show a splash screen when the machine is resuming as well. Right now, the screen stays black while the machine is resuming. I guess most probably the troublemaker is the vga card by NVidia, that is run by NVidia's driver (NVIDIA-Linux-x86_64-310.19), which I installed manually. As far as I understand it, when I do hibernation, the NVidia driver is active and doesn't work with Plymouth.
If this is so and there is no solution to this little problem, then I just will have to live with it and I don't need to look for a solution any further. If there is a simple solution to the problem, I'd be very happy to look at something more than just a black screen when resuming.