Crashes my OS when my computer tries to go to sleep

[tom-broadbent]

Whenever my PC goes to sleep, it freezes and I can't do anything and need to reboot. Don't know whether this is the cause but I see a whole bunch of lines in the logs like:
DBG id=8B1EF0F6F83D565F!15160 nodeID=1769 op=OpenDir path=path
It seems to be trying to open literally every single directory?
I'm running Arch Linux if that makes a difference.