On 1/5/19 5:46 AM, Long Wind wrote: > i've just installed jessie via network > ... > i'll provide more details upon your request > > Thanks! Yes ! please provide more détails wich is your computer's model. and especialy if it's a lenovo: there is driver/hardware bug on family lenovo computers: black screen after boot on debian testing. but I recently updated fews days ago and bug is fixed now (this problem was present for about one month)