Ubuntu 18.04 shows a black screen after boot

post by aminvision on Sep 6, 2018

I have a Lambda Quad machine, it was installed with Ubuntu 16.04, I tried to install ubuntu 18.04. however, after installation, and system boot, it just shows a black screen.

post by sabalaba on Sep 7, 2018

Hi Aminvision,

Can you try the following?

When you get to the GRUB boot loader (it looks like this):

Press e and then add this to the end of the linux line:

nouveau.modeset=0

Then hit F10 key to boot into the Ubuntu system. You can then install Lambda Stack like so:

LAMBDA_REPO=$(mktemp) && 
wget -O${LAMBDA_REPO} https://lambdalabs.com/static/misc/lambda-stack-repo.deb && 
sudo dpkg -i ${LAMBDA_REPO} && rm -f ${LAMBDA_REPO} && 
sudo apt-get update && sudo apt-get install -y lambda-stack-cuda

post by Stjerp on Jul 10, 2019

This does not work at all! It solves nothing!

post by japos on Jan 4, 2020

I have exactly the same problem, and I did your suggestions, unfortunately, it the problem remains.

post by solarflarefx on Nov 2, 2020

@japos and @aminvision Were either of you able to ultimately solve your problem?

post by dinesh on Nov 7, 2020

I got it into the same problem. When I tried updating the grub, I got into different set of error, which starts with PKCS#7 Signature not signed with a trusted key and ends with EDAC Sbridge: Failed to register device with error -19.

All this happened after I tried to upgrade the OS, Ubuntu 18.04.

Any help to recover would be appreciated.

post by sabalaba on Nov 13, 2020

If you’ve got a Lambda system, you can email support@lambdalabs.com and they’ll help you fix it.