I am using the headless version of Chrome and Chromium to take screenshots of given pages.
It works fine on Windows and Ubuntu server, but not on an Ubuntu Desktop VM.

I get the error "Open multiple tabs is only supported when remote debugging is enabled" on Ubuntu Desktop when I try to take a screenshot (--screenshot flag) or to generate a PDF file (--print-to-pdf flag).

I could enable remote debugging with the --remote-debugging-port flag, but when it is enabled, you can not use the --screenshot flag or the --print-to-pdf flag.

Details

On windows

Version :
Google Chrome Version 84.0.4147.125

Command used :
> start chrome --headless --screenshot=%CD%example_sh.png https://example.com/

Note: you have to give a path to the screenshot on windows or else it will not create the file, this is why I added %CD% on Windows only. But this is not the issue here.

Command output :
None

File generated :
Yes

On Ubuntu Server

Version :

$ chromium-browser --version
Chromium 84.0.4147.105 Built on Ubuntu , running on Ubuntu 18.04

Command used :
$ chromium-browser --headless --screenshot=example_sh.png https://example.com/

Command output :
[0812/102830.971006:INFO:headless_shell.cc(615)] Written to file example_sh.png.

File generated :
Yes

On Ubuntu Desktop

Version :

$ chromium-browser --version
Chromium 84.0.4147.105 snap

Command used :
$ chromium-browser --headless --screenshot=example_sh.png https://example.com/

Command output :
[0812/123941.367535:ERROR:headless_shell.cc(174)] Open multiple tabs is only supported when remote debugging is enabled.

File generated :
No