do-release-upgrade without X11

[Xavier Bertou]

when one has no X11 and does a do-release-upgrade via ssh without X11 forwarding, something keeps complaining about "X11 connection rejected because of wrong authentication". While this is not such an issue, it fills the screen and makes answering the few questions asked during the upgrade problematic.
I'd suggest adding a 2> /dev/null to the application looking for X11 connection.
This was using do-release-upgrade on 11.10 to upgrade to 12.04.

[Ubuntu Foundations Team Bug Bot (crichton)]

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[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Xavier Bertou (bertou-v)]

We are in 2016, I've updated my ubuntu servers to 16.04, and there is still this issue. Does nobody ever run a do-release-upgrade after an ssh and an su? Just redirecting X-11 errors to /dev/null solves the issue. Come on, I know you can do that before the "Z" release...

[Giovanni Pelosi (hute37-gmail)]

It is 2023 and ssh (x11 forward on in config) tmux and sudo -i before do-release-upgrade
still fills the log with `X11 connection rejected because of wrong authentication` errors.

`stderr` redirection (`2>/dev/null`) obviously is *not* an option.

Better do not trash message like this: `No space left on device` during an upgrade

User prompt appears in "curses" dialog. OK

[Mikael Hjelm (j-m-hjelm)]

This is a real issue since the spam of "X11 connection rejected because of wrong authentication". might hide a user input request and since the console buffer is full one might not go back to see what the required input was. For me the install had hung on a firefox and snap question which i did not notice.
It is not always safe to press enter either since that may be a bad choice.