1.5b4 Mac Pro hangs on system sleep, does not put monitors into power saving mode.

[Patrick]

Originally Posted by SpyderZ

Leopard (10.6.1)

1. System hard locks every time attempting to put the machine to sleep with Option + Cmd + Eject.

2.When using the turn off monitor shortcut Ctrl + Shift +Eject, only the video card monitors go into power saving mode. The DisplayLink Monitors stay off in black mode but are still on.

We tested sleeping and haven't seen any problems. Do you have other hardware installed ? As you mention 10.5.7 working and 10.5.8 does not this sounds extremely weird as it would mean it's not depending on the DL drivers ????
Send me the logs and profile please.

Regards - patrick aka Jolly