Views don't display any result until the exposed form is submitted I have a view that display content on my website, but now (i don't know why) my view show results only when i submit the exposed form.

I would like my view display all result by default.

Any idea ?
I think you have marked the exposed filter as required. 

Uncheck the "Required" checkbox right below the "Expose this filter to visitors, to allow them to change it" checkbox.