Suspend to ram doesen't work

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https://bbs.archlinux.org – Hi. I would like to ask for your advice. I have problem with suspend to ram. In order to have nvidia drivers i had to install newest kernel, 3.12.xx. I found that suspend to ram doesen't work. I put my computer in sleep mode by typing sudo systemctl suspend , everything works, computer goes in sleep mode but after resume from it, after wake up i have only black screen with unblinking cursor on the left upper corner of screen. I can't kill x, can't do anything in tty, only hard reset.I removed nvidia drivers in order to check older kernel, and found that with nouveau drivers ker (HowTos)