I have a PowerMac Dual G5 2.0 with 1.5G of ram with 10.4.2 Tiger installed. Just recently over the last couple of days for some reason, after the computer has gone to sleep and I push a button on the keyboard to wake it, nothing on the OS X seems to work except for the mouse, and that is often delayed by about 20 seconds before it will operate. The desktop looks fine, but when you mouse over the dock nothing happens. The taskbar can't be clicked and it seems as if clicking is disabled all together. I end up having to hold down the power button to shut down and then turning it back on. As soon as it restarts, everything is good to go and it works fine again. Anyone have any suggestions? I don't even know if this is hardware related or software related.