Rare / occasional wake from sleep problem

[cyberderf]

I got the sleep working on my EP45-UD3L using Lion 10.7.4 except this morning it refused to wake for the first time. Most of the times it works perfectly. Here what my Mac journal have to say :

 

12-06-27 09:42:02,000 kernel: Wake reason: ?

12-06-27 09:42:02,000 kernel: SMC::setPowerState ERROR: smcPublishSleepCause failed (kSMCKeyNotFound)

12-06-27 09:42:04,910 configd: network configuration changed.

12-06-27 09:42:06,187 ntpd: bind(25) AF_INET6 XX::XX:XX:XX:XX#123 flags 0x11 failed: Can't assign requested address

12-06-27 09:42:06,187 ntpd: unable to create socket on en0 (14) for XX::XX:XX:XX:XXe#123

12-06-27 09:42:17,000 kernel: Graphics suppressed 15564 ms

12-06-27 09:42:17,591 configd: network configuration changed.

12-06-27 09:42:18,611 configd: network configuration changed.

12-06-27 09:42:18,621 mDNSResponder: mDNS_RegisterInterface: Frequent transitions for interface en0 (192.168.1.104)

12-06-27 09:43:02,621 powerd: PMScheduleWakeEventChooseBest: m=0.00 s=0.00 a=0.00

** I replaced my Mac address with XX::XX:XX:XX:XX **

 

Any hint on what might have caused this problem ?