Comment 35 for bug 424511

It seems it is a constant problem. I faced with that, the symptom was: after GRUB booting the big fat nothing happened, only a black screen (sometimes with the Ubuntu logo). Absolutely no answer for the keyboard tries (the F keys and so), I could only make a 'hardreset' (pushing the ON button for 14 seconds). My laptop is a Dell Latitude 5401, and before the problem I've changed the nVidia settings (nVidia GeForce MX150 card from 'on demand' to 'Performance Mode'. The system rewrote the xorg.config file to the nVidia settings, and this way - as I suspected - this caused a window-handler system failure in Ubuntu. Nothing helped, I tried a lot (key-combinations, Boot-Repair from USB, using Boot-Repair's terminal, etc.), but at last I found the solution. I loaded Puppy linux, and this way I managed to access and delete that config file from /etc/X11 (xorg.config). After all, everything goes fine, but now I don't have a xorg.config file in /etc/X11 folder (do I need that at all?).