I just downloaded Ubuntu 15.04 and I put it into a pendrive. When I boot the pendrive, Ubuntu logo starts to charge but after a while, the monitor turns black with the mesaje "Frequency out of range: Horizontal 95 KHz - Vertical 60 Hz", so I cant continue with the installation due to not seeing anything.
My graphics card is nVidia GTX-970. My monitor is an old ViewSonic VG2021wm that probably does not support more than 60Hz or even less.
How can I configure the Ubuntu installer to decrease the used monitor frequency?
