Haven't had this issue up until now, but I went from 10.8.3 to Mavericks. Running a GA-Z77X-UD5H, i7 3770k, using HD4000 graphics - Monitor connected via DVI.
Machine boots fine, restarts fine, and manually sleeping/turning off display allows waking within a minute or two by hitting the...
Edit: Tried DVI instead of HDMI.. Worked perfectly. Also used "-v PCIRootUID=0" during install/first boot and it seemed to make things work better (proper resolution, etc).
I walked through the 10.8 Installation Guide and the BIOS setup for Gigabyte boards, I went through them each about 10...
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