Since as far as I can remember, suspend never worked due to the following USB controllers not powering off at suspend, resulting in a freeze (?). 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05) A fix is documented here, manually turning the controllers off when computer is going to sleep. https://help.ubuntu.com/community/Asus_U36SD#Suspend Some debugging information is available here https://bugs.launchpad.net/ubuntu/+source/linux/+bug/975341 I will try to do my best helping with additional information if requested.
Mainline 3.4-rc1, not sure if the same bug exists, suspend doesn't work, but there is no freeze as far as I can tell. It seems it doesn't even "try to" suspend. However, some devices (like wifi) are malfunctioning after trying to do a suspend. Also, it looks like the fix for 3.2 doesn't work in 3.4-rc1. Will test some more to make sure.
Have you debugged the issue by steps in the sourcetree/Documentation/power/basic-pm-debugging.txt？ If no, try it.
The following STD tests were made with the USB controller fix. Hibernation in "reboot mode" worked 5+ times in a row. "platform mode" did not shutdown the computer, the screen went black and nothing happened. However, when I boot it up again my session is restored. "shutdown mode" worked 3 times in a row. Now for the STR part. The USB controller fix is disabled, to be able to reproduce the problem. init=/bin/bash, running s2ram -f the screen goes black for a few seconds, then back to my session, this happens for all pm_test string, such as "freezer", "devices"... "core". All seems fine, until I set pm_test to none (which is the default?). The computer goes bonkers, fan spinning up, all I see is a blinking _ in the upper left corner. If you want me to test something else, just tell me and I'll try to help.
Hi, Could you test this kernel? I added your pci id in it. http://people.canonical.com/~acelan/bugs/lp951143/
Marking this as duplicate of #42728, because my problem is related to the same USB controller as in #42728 *** This bug has been marked as a duplicate of bug 42728 ***