I have just tried kernel 2.6.34-020634-generic as well on my Dell Latitude 
D600, but it does not fix the problem. 
It still suspends ok but will not resume under any provocation, eg opening top, 
FnEsc CntlAltBacksp, CntlAlt1 power button or any single key or combination. 
The power light slowly flashes as it should (and used to before 10.4) in 
suspend mode. Worked fine in Karmic.
I note that there are more recent kernels listed, will these be of any use, I 
wonder, could any have been written to fix this bug? rc7 perhaps?
As written elsewhere I have also tried changing back to Grub instead of grub2 
(some of the suspend scripts certainly refer to files and dirs that are not 
there in Lynx.) Also note that my grub menu is no longer accessible 
My pm-suspend log seems to show successful suspends every time. 
Unfortunately there is no pm-resume or unfreeze or thaw log  (that I could see) 
to indicate what is going wrong.
Also tried other remedy of changing Appearance>visual effects to Extra and back 
also a no go.
Frankly I don't think its in the kernel but in some other peripheral files 
which 10.4 Lynx has changed/moved/or done away with.

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black screen after resume from suspend to ram / disk
https://bugs.launchpad.net/bugs/131628
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