Error message on login

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I'm using Ubuntu 15.04 dev with lxsession 0.5.2-0ubuntu2 and on every login I'm getting the error message "No session for pid _pid_". Downgrading to version 0.5.2-0ubuntu1 solves this issue.

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

This is a dialog box? Are you sure this is not with the guest session? Does it have any effect?

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The error message appears in a dialog box with my main account.

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

Which particular image?

What affect does it have?

What information can you provide in terms of logs?

[Removed by request (removed3425744)]

> Which particular image?

It is an upgraded system (should be installed on 2012-10-17 from the latest available stable release of Ubuntu at this time).

> What affect does it have?

I'm seeing the background image of LXDM until I click OK. After this all seems to be working fine.

> What information can you provide in terms of logs?

I'm not seeing something suspicious. If you want to see a specific log just say which one I shall attach.

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

Well, a fresh system does not have this problem, so I guess you'll need to track someone down to confirm that is in a similar situation.

I will set this as low since it has no affect.

Providing logs from lightdm (I assume you mean that and not LXDM), X, and lxsession would all be useful.

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No, I'm using LXDM. Also I'm not on Lubuntu just in case you thought this. In the attachments are all the requested logs. The last time I have not made a look into run.log but there is a line about lxsession. Maybe it has something to do with this issue?

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

That polkit issue in the run.log is interesting. Does this happen with a new user?

I do know that we had some issues with permissions that were changed in 0ubuntu1 but not properly implemented. 0ubuntu2 simply forced regeneration of .c files so that the fix from 0ubuntu1 would be implemented.

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You mean "(polkit-gnome-authentication-agent-1:1451): polkit-gnome-1-WARNING **: Error getting authority: Error initializing authority: The connection is closed"? Maybe this comes because I'm restricting the system and session bus of D-Bus. After giving them unrestricted access again and rebooting the system the error message still appears after a login. Also the polkit message in the log has changed. There are now "** (polkit-gnome-authentication-agent-1:1548): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files" and "(polkit-gnome-authentication-agent-1:1548): polkit-gnome-1-WARNING **: Unable to determine the session we are in: No session for pid 1548".

[ԜаӀtеr Ⅼарсһуnѕkі (wxl)]

Does this all happen with a new user?

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Unfortunately I can't test this because of this bug: https://bugs.launchpad.net/ubuntu/+source/lxdm/+bug/1416902

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Also I'm noticing that this error message and the window title isn't translated into german.

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The other issue doesn't appear anymore so I could test this issue with a new user. After creating the new user and loging in with him the same issue appears there too. Any idea how to debug this more?

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After upgrading to lxsession 0.5.3-2 I'm not seeing this issue anymore.