On many ASUS laptops and probably on some non-ASUS ones you need to unload ehci_hcd or unbind both USB controllers from it before entering S3, else the system will lockup. Here are some links: http://thread.gmane.org/gmane.linux.kernel/1222803 https://bugzilla.kernel.org/show_bug.cgi?id=37632 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=658778 http://ubuntuforums.org/showthread.php?t=1444822 This still happens on my K53E on v3.4-rc2-16-ga9e1e53. Unbinding just one of two controllers doesn't help. Disabling /sys/bus/pci/devices/0000:00:1[ad].0/power/wakeup doesn't help. echo mem>/sys/power/state doesn't hang with 'core' in /sys/power/pm_test, only with 'none'. Windows 7 enters S3 perfectly well. I didn't see any other suggestions how to debug this. I can provide any debug data if that will help. This seems to be a very important problem for owners of certain devices. -- WBR, wRAR
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