https://bugs.freedesktop.org/show_bug.cgi?id=43858
--- Comment #19 from Valter valter.giovannetti@alice.it 2012-01-18 08:32:56 PST --- Hello everyone. I think I have solved! Just simply unplug the VGA cable and now the monitor works perfectly with the settings suggested by Alex!
Thank you all for your precious help!
One last question (if si possible): When I start the computer and launch Ubuntu, the mouse pointer, at the login screen. is corrupt. If I access so, the desktop is corrupted by light blue lines. However, if all goes well, reboot. Everything is fine even if boot Windows first and then reboot and launch Ubuntu. In practice, when I turn on the PC, if I want to use Ubuntu I have to reboot to get everything in place. This happens even if I use VGA.
You have an idea of why?