xfce4 suspend problem

[François Patte]

Bonjour,

When I suspend my computer, it suspends for a few seconds, then
resumes.... So it is impossible to suspend!

Once upon a time, I could find some information the pm-suspend.log file.
Today, I cannot find this file! Is there no more log file for pm-suspend
or did I miss how to activate this file?

I use xfce4

Thank you for helping.