Assuming you're using Clover, you need to set the darkwake attribute. darkwake=8 worked for me on a Skylake setup (Z170X, Core i5, nvidia graphics card with we

Assuming you're using Clover, you need to set the darkwake attribute. darkwake=8 worked for me on a Skylake setup (Z170X, Core i5, nvidia graphics card with web drivers). Sleep and wake work flawlessly.