Comment 34 for bug 1419355

Hi, I have the same problem. Shutting down works correctly on 3.11.10 kernel and results in a restart after a few seconds on 3.12. Hardware: ASRock B85 Pro4 motherboard (latest BIOS), Haswell i5 4670. I put more info here: http://marc.info/?l=linux-acpi&m=138521027528049&w=2

I tried 3.12.4 with a patch from comment 16 applied but it didn't change anything. Also, after removing xhci_hcd module my mouse and keyboard lose power and my system hangs.