After 12.10 upgrade my monitor doesn't sleep at login screen

[BobW]

When sitting at the login screen my monitor no longer goes into low power sleep mode. It does go to sleep correctly when a user is logged in. This worked in 12.04.

Any suggesteions what to check?

[pbekesi]

I have the same issue since the 12.10 upgrade. When on the login screen, it doesn't put the display into suspend mode, only blanks it instead.
No problem when any user is logged on.