*** This bug is a duplicate of bug 129226 ***
https://bugs.launchpad.net/bugs/129226
I have the same issue on my d630.
Here is a (dirty) fix:
add the attached file in
/etc/acpi/resume.d/97-d630-resume.sh
It seems to work reliably for me.
Btw, it may be related to
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/138465
and
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/88899
** Attachment added: "/etc/acpi/resume.d/97-d630-resume.sh"
http://launchpadlibrarian.net/11165585/97-d630-resume.sh
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Suspend enables only CPU0 after wake up
https://bugs.launchpad.net/bugs/145876
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