So I have a fairly new (two weeks old) Ubuntu installation (14.04 x64) and it looks like Suspend mode does not work…
When I click System -> Suspend the screen goes black for about one seccond and then everything comes back to normal, and my wifi is reconnecting. No error message ever comes either.
I tried it on another laptop (an old netbook x86, Acer) and it worked as expected on that one, even automatically suspended when I closed the lid.
Any tips for solvig this really annoying problem? I am still used to just closing the lid when I leave my computer for a few hours as I was using Windows since recently, but now when I come back I'm finding my battery almost drained.
Best Answer
I have had this issue with both pm-suspend and closing the lid - except for in my case the wake up would happen 50-90 seconds after suspend. Just long enough for me to have stuffed the laptop in my bag where it has no chance of cooling itself.
After lots of searching, and even writing a work-around program which would invoke "pm-suspend" when the lid was closed I found that something other than the lid could wake up the machine:
After this, pm-suspend worked (did not wake up again after a few minutes) and the lid did too.
Since the wake-up happened only a few seconds after the light in the keyboard (it's a macbook pro) went out - I assume the culprit "XHC1" must be the keyboard - which also explains that if I suspend with pm-suspend I cannot wake it by hitting normal keys, only the power button.