I experience this behavior on a T61 so I don't think it's a Sandy Bridge problem. I've experienced it since F14. I also use a docking station and external display and remember back when I was running F14 I found a bug report somewhere confirming that (at least on F14) it was related to the external display. I'll have to look and see if I can find that bug report and also check if one exists for F15 yet.

You're right this is a terrible problem, because at least for me, it's intermittent, but when it happens you can kiss your unsaved work goodbye :(

On Fri, Jun 24, 2011 at 7:25 AM, Darryl L. Pierce <dpierce@redhat.com> wrote:
Whenever I try to put my laptop into either suspend or hibernate mode
(i.e., close the lid when not plugged in) the laptop _seems_ to be
trying to go to sleep but never quite gets there. The battery light
stays on, the sleep light (crescent moon) light blinks, but there's no
disk activity and the power light stays on.

And nothing short of holding the power button down and forcing a power
off works for bringing the laptop back out of htis state.

Any ideas on what I should or could do to get suspend to work again?
It's a PITA to have to hard shutdown the laptop when I accidentally shut
the lid.

--
Darryl L. Pierce, Sr. Software Engineer @ Red Hat, Inc.
Delivering value year after year.
Red Hat ranks #1 in value among software vendors.
http://www.redhat.com/promo/vendor/


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