1) download Coral Reef Adventure (IMAX) wmv demo from Microsoft site.
it takes 1:45 minutes for the play.
2) set energy saving options
sorry but I've Italian Vista edition. but should be clear.
set 1 minute for "disable monitor option".
3) start kmplayer with this file and its copy
start play. and do not touch keyboard and mouse. Kmp should be play these files in 3 minutes and 30 seconds. kmp complete first files and maybe the second files but when the play is over the monitor should be shutdown after another one minutes so 4:30 minutes after start but instead shutdown happen after few seconds.
With other files more complex with matroska splitter for example almost constantly the monitor shutdown after first file is over because file change take more seconds. Imho kmp should wait end of playlist at least and delay screen saver or monitor energy saving for another preset time.
If I set 10 minutes and play two files for 42+42 minutes the monitor should shutdown after 42+42+10 minutes=1 H and 34 min. At this moment shutdown after 42 minutes and few seconds often.
this in Vista I'll try with Xp in other dual-boot s.o.