Ubuntu don't boot

[oldfred]

If you have the nVidia card, you need nVidia driver or nomodeset.
You used to always use nomodeset to boot live installer & first boot or until you installed proprietary nVidia driver.

If installed press escape to get grub menu and add nomodeset.
The recovery mode also has the nomodeset parameter.

Safe Graphics Boot option on installer adds nomodeset.
At grub menu you can use e for edit, scroll to linux line and replace quiet splash with nomodeset.
How to set NOMODESET and other kernel boot options in grub2 - both BIOS liveCD & grub first boot ( also UEFI with grub)
How to add boot parameters, grub menu after install (also grub when UEFI)
https://wiki.ubuntu.com/Kernel/KernelBootParameters &
https://help.ubuntu.com/community/Grub2
http://ubuntuforums.org/showthread.php?t=1613132

[poncho2808]

Booting with nomodest parameter helped. Thank you very much