[Ubuntu-ma] ubuntu freezes

[kosaidpo]

salamo alaykom
hello people : D

my ubuntu freezes after my desktop shows up and i loose controle on my
keyboard and everythin except that turn off button that i use to
reboot again to face the same problem again

any idea how to fix it
i would love to right in arabic but it takes more effort and i didnt
in french cus i've sent it to many ML so i jst copy/paste
tnx
kosaidpo