I have just installed Ubuntu (12.0.4 TLS for Servers) on a DELL poweredge 2850. During the installation, the process goes OK. However, as soon as I start the system normally (and the text font is changed) it starts continuously blinking: 4 seconds I can see the screen, 4 seconds is black, and so on and so forth. This annoying behaviour does not happen during installation or if I run x-windows. Any ideas of what could be happening?
PS: I have asked in Ask-Ubuntu (http://askubuntu.com/questions/314771/ubuntu-blinks-in-dell-2850) and have been redirected here