Black screen on Lenovo Z510

[alexz]

Hi All!

The first is on installation when I'm booting from USB stick, I'm getting black screen, only external monitor helps me to install the system.
After installation the system loads again with black screen, only when I have typed the password and pressed the Enter, the black screen is going away.

It seems some problem with default brightness on this laptop.
Can someone help me to solve the problem at least with post-installation black screen?

Thanks!

[SteveRiley]

Try this...

Elevate to root and open /etc/default/grub in a text editor. Find the line containing GRUB_TERMINAL_OUTPUT=console and remove the comment sign at the beginning of the line. Save the file and exit the editor. Now run sudo update-grub. Reboot. Does the problem go away?