I saw this.
Which of these two should I use?, my graphic card is ATI Radeon HD 5450.
Also, I don't understand what exactly amd64 means when talking about this graphic card, my CPU is a corei5, I think this amd64 is not related with my CPU, but any insight in the topic is greatly appreciated.
I tried first link, previously I reinstalled video related packages and it worked again
But now is completely broken.
reinstall worked, I was forgetting
apt-get remove fglrx*.
Another option I found is this one.