I am having a strange problem. After my server (4.1.2) has been up for more than a few weeks I will go to use the console but get no response from the keyboard, I can't login or do anything. The screen just stays black. Usually, if it is working, when I hit a key on the keyboard the screen comes up with the login prompt. The only way I can get it to work again is to push the reset button and restart the server. It then works for a while and then the same problem. The weird thing is the web server, samba, and even SSH access continue to work. Any ideas would be greatly appreciated. Thanks.