I have a dual-boot installation and after choosing Ubuntu in the GRUB menu both the built-in and external monitor displays go black if the HDMI cable is connected to the laptop. If I wait about 30 seconds and press Ctrl + Alt + Delete I can boot normally. I can't access ttys when the displays go black. If I boot up without the HDMI cable connected everything run as normal and if I connect the cable after the boot I have no problem with the second screen.

I am using Ubuntu 18.04 on a lenovo ideapad 700 with gnome 3.28.2. My kernel version is 4.15.0-42-generic. I am using nouveau drivers.


I discovered a way to workaround this problem. Basically what I did was to boot with nomodeset option active in the grub. After that the black screen appears but i was able to acess tty and reboot my computer. The following boot process was normal even with an external monitor connected.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.