interface problems

HI!!

Im having some problems with my new Trisquel installation :

- First, every time it's initializing i can see 3 erros
error:no suitable mode found
error:No video mode activated
error:unknow command 'terminal'

- Then, after i login, sometimes i can not see the icons on the desktop or sometimes i can not see the bottom banner with the main menu, but i can always use Alt+F1

- The xorg default driver is: vesa, and i have xserver-xorg-vesa installed

- I have done the installation 2 times, first: graphic mode then text mode.

- I am now installing again, and i will prove installing another desktop manager.

Any other ideas???

Thanks