Cannot run Cypress on Ubuntu 18.04

[tgrander]

Current behavior:

I run npm install in my git repo, install all Cypress dependencies with apt-get, and run npx cypress run. The error above is shown.

Desired behavior:

Cypress can be opened and ran

Test code to reproduce

Install Cypress on Ubuntu 18.04 and try to run it

Versions

Cypress Version : 3.8.2
OS : Ubuntu 18.04.3
Browser : Chrome

[jennifer-shehane]

There are updated instructions on the required dependencies in our docs here: https://on.cypress.io/guides/guides/continuous-integration#Dependencies

Can you verify you have installed all listed dependencies then run cypress verify in debug mode mode and print the entire set of logs here?

[jin60641]

There are updated instructions on the required dependencies in our docs here: https://on.cypress.io/guides/guides/continuous-integration#Dependencies

Can you verify you have installed all listed dependencies then run cypress verify in debug mode mode and print the entire set of logs here?

Thanks for reply! But the link you gave is not valid. I think that was https://on.cypress.io/guides/guides/continuous-integration.html#Dependencies (.html was missing)

[tgrander]

I have installed all listed dependencies. My first screenshot here captures that.

Running DEBUG=cypress:* npx cypress verify prints the following:

The error message from Cypress is not helpful at all. It is just Command failed: /home/ubuntu/.cache/Cypress/3.8.2/Cypress/Cypress --no-sandbox --smoke-test --ping=26

If I run the command that failed, /home/ubuntu/.cache/Cypress/3.8.2/Cypress/Cypress --no-sandbox --smoke-test --ping=26, then I get the message: (Cypress:20557): Gtk-WARNING **: 13:54:26.751: cannot open display:

[tgrander]

Update: if I do brew cask install xquartz on my machine then I am able to ssh into the Ubuntu machine using the -X arg and successfully do cypress run. However this will not work in the CI environment because the ssh'd Ubuntu machine is relying on my local machine to run the GUI. This seems like a problem with Cypress.

It seems like there is a dependency missing for running the GUI in Ubuntu. I have installed all dependencies listed in the Cypress docs. Is there any dependency for the GUI that is missing from that list?

[tgrander]

UPDATE: it works fine on Ubuntu 16, which leads me to believe that Cypress is incompatible with Ubuntu 18

[flotwig]

Hey @tgrander, I am running & developing Cypress on Ubuntu 19.10, I'd be surprised if it was incompatible with 18.04. It seems like something is wrong with your X setup, do you use Wayland or X normally?

[flotwig]

Normally, in CI, Cypress uses xvfb to set up a virtual framebuffer, so you don't need to do the X situation you're describing. It only does this if the DISPLAY environment variable is blank, so does running DISPLAY= npx cypress run work for you @tgrander ?

[tgrander]

@flotwig I'm not using X at all on either the Ubuntu 16.04 or the 18.04 machine and yet it does work on 16.04

I tried running DISPLAY= npx cypress run on 18.04 and that does not work either

[flotwig]

@flotwig I'm not using X at all on either the Ubuntu 16.04 or the 18.04 machine and yet it does work on 16.04

I tried running DISPLAY= npx cypress run on 18.04 and that does not work either

Yeah bizarre, I was able to reproduce this locally by running Ubuntu 18.04 in Docker.

Wrapping it in xvfb should work as a workaround (worked for me), try this: xvfb-run npx cypress run

[bahmutov]

This is a duplicate of #6184 see temp workaround #6184 (comment)

A fix has been merged in #6199 and will be released in 3.8.3