apollokillers1 wrote:it reboots and grub appear,the linux starts....i see there the 2 lines : to wait and the next 1 with the files and blocks line
That's all I get on my Dell laptop. Of course mine proceeds to a desktop whereas yours doesn't. What I'm trying to say is the output you're seeing is correct, but it's struggling to start X.
But if you've seen GRUB and Linux starts, then it IS booting and not necessarily a kernel issue. But if there's a problem with the video driver then X won't start which could explain what you're seeing. Maybe the nouveau drivers don't fully support your nVidia 750Ti.
apollokillers1 wrote:there is where it gets stuck.
Can you switch to a console at this point to get a login prompt? If so, perhaps blacklist the nouveau driver so X reverts to a generic VESA driver. Then you should be able to get to a desktop.