Lenovo Thinkpad sleep issues and Ubuntu

Recently I’ve been having problems with Ubuntu and sleeping my laptop and it turns out it has the strangest cause.  I even rolled back to a 9.10 version since that used to work.  And it did for a while.  Then it stopped.  All I got was the sleep light flashing constantly.

It looks like the issue was actually having an SD card in the reader on my laptop.  As soon as I took it out I could sleep as usual.

Thanks to this thread for the suggestion – http://ubuntuforums.org/showthread.php?t=1470067