I upgraded to 14.10 this bugs is gone.
And resume is incredible fast!
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https://bugs.launchpad.net/bugs/1315026
Title:
[Dell Inc. XPS M1330][14.04 Regression] suspend/
Public bug reported:
I have been using this laptop with ubuntu since day 0. It was working OK.
Did clean install ubuntu 14.04, now 90% of the times I does not resume.
I also noted that I don't have any option to hibernate (don't know if
that might be related)
NO envidia or any special hardware.