I am on an old laptop with Ubuntu 9.10 installed. I once tried to not shutdown but go into one of the resume states. On the next power on, resume did not work, but there was an error message during boot asking me for the resume image (which I do not have or know of) and when I press enter the normal boot happens.

But this error pops up on every boot now. How can I get back the behaviour from before? Why does the boot process guess there would be a resume image and can I delete this information?

I would like to post here the error messages from the boot proces, but they are not in /var/log/syslog, where else can they be?