suspend troubles on H67

Hi,

I have these problems :

when I put the system to ‘sleep’ (suspend to RAM , or even hybernate) then sometimes
the system does not wake up properly (power led, stops blinking but the system is ‘frozen’ I mean keyboard leds are not working / usb frozen / no video … just the CPU fan starts)

I even tried the “s2ram -f a3”, this seems to be working , but after a while I could not wake up the system…

my specs:

Asrock H67M-ITX (H67 Motherboard Series Manufacturing - ASRock Inc. ) (4GB RAM, i5-2500). I don’t have a GFX card, I just use the internal (intel HD 2000).

Thank you in advance.

Otto

problem solved… after a long time… system suspend/resume works very well with Gnome/XCFE etc BUT not under KDE!
what the heck…