Session disconnects, can't reconnect during Ubuntu system upgrade

[jpmorrison]

Connected to Ubuntu 20.04 with MS RDP. Xrdp was installed from Ubuntu repositories

Ran do-release-upgrade -d in a terminal window and the RDP session dropped.
Reconnecting shows the log/login prompt - after logging in the session is dropped again.

Not sure which logs are useful
/var/log/auth,log

May  1 15:54:19 ubuntu-test xrdp-sesman[2269689]: pam_unix(xrdp-sesman:session): session opened for user jmorrison(uid=1000) by (uid=0)
May  1 15:54:19 ubuntu-test systemd-logind[4244]: New session c19 of user jmorrison.
May  1 15:54:20 ubuntu-test systemd-logind[4244]: Failed to restore VT, ignoring: Bad file descriptor
May  1 15:54:21 ubuntu-test xrdp-sesman[2269689]: pam_unix(xrdp-sesman:session): session closed for user jmorrison
May  1 15:54:21 ubuntu-test systemd-logind[4244]: Session c19 logged out. Waiting for processes to exit.
May  1 15:54:30 ubuntu-test systemd-logind[4244]: Removed session c19.

[bmullan]

So were you trying to upgrade the remote Ubuntu from 20.04 to 22.04 over an RDP connection ? *do-release-upgrade -d*

which is what that command would do? Did I read your email right? brian

…

On Sun, May 1, 2022, 7:04 PM jpmorrison ***@***.***> wrote: Connected to Ubuntu 20.04 with MS RDP. Xrdp was installed from Ubuntu repositories Ran do-release-upgrade -d in a terminal window and the RDP session dropped. Reconnecting shows the log/login prompt - after logging in the session is dropped again. Not sure which logs are useful /var/log/auth,log May 1 15:54:19 ubuntu-test xrdp-sesman[2269689]: pam_unix(xrdp-sesman:session): session opened for user jmorrison(uid=1000) by (uid=0) May 1 15:54:19 ubuntu-test systemd-logind[4244]: New session c19 of user jmorrison. May 1 15:54:20 ubuntu-test systemd-logind[4244]: Failed to restore VT, ignoring: Bad file descriptor May 1 15:54:21 ubuntu-test xrdp-sesman[2269689]: pam_unix(xrdp-sesman:session): session closed for user jmorrison May 1 15:54:21 ubuntu-test systemd-logind[4244]: Session c19 logged out. Waiting for processes to exit. May 1 15:54:30 ubuntu-test systemd-logind[4244]: Removed session c19. — Reply to this email directly, view it on GitHub <#2245>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAM23J6MEM4KCXII3GHQ2YLVH4EXHANCNFSM5U2RJJQQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[matt335672]

I think this is a consequence of two things:-

1. sesman is not currently restartable (Running sessions "lost" if xrdp-sesman restarts #800). This is being worked on, but is a major change (see Redesign of authentication architecture #1961).
2. Systems using systemd --user don't allow more than one graphical session per user. This isn't something we can work around in xrdp, but it might be possible by using containerised desktops.

When xrdp is upgraded, it will need to be stopped and restarted. This leaves an orphaned session (point 1). Because this session is active according to systemd however, you will be unable to start a new one (point 2).

I can understand you really want to connect to the old session however, to see how things have gone. Have you got another machine running with a graphical login available?

[matt335672]

No response from OP - closing