[arch-general] Can't suspend or hibernate

Hey I haven't been able to suspend my desktop for about 6 months now. I'm not sure what has caused it. I haven't had any hardware changes and even a reload hasn't fixed the problem. I've tried reading the wiki on suspending and run some tests using pm-suspend. It suspends processes fine according to the guide I was following, but it seems to get stuck at suspending hardware. I tried disabling as many modules as possible to then get it to suspend but still no luck. Is anyone else having this problem or has anyone fixed this problem? Regards Brock