[Bug 1435492] [NEW] Xsession crash after login (fix for #678421 breaks)

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According to changelog.Debian from version 1.12.3 on lightdm is using
"bash for the session to improve error handling" to fix #678421.

Unfortunately this can break the session start up when the user sets the
$PATH environment variable in ~/.bashrc. Then /sbin might no longer be
in $PATH and /etc/X11/Xsession.d/99cadence-session-start won't find
/sbin/upstart when calling "upstart --user"

The mechanism is the following:

1. /usr/sbin/lightdm-session lines 37-42 source among others ~/.profile

2. The usual .profile of /etc/skel will source ~/.bashrc if the shell is
Bash (and not /bin/sh)

3. ~/.bashrc (maybe) is setting $PATH without /sbin

4. upstart --user call fails as /sbin is not in $PATH

Suggested solutions:

* switch back to /bin/sh

* make sure that /sbin is in $PATH

** Affects: upstart (Ubuntu)
     Importance: Undecided
         Status: Triaged


** Tags: patch
-- 
Xsession crash after login (fix for #678421 breaks)
https://bugs.launchpad.net/bugs/1435492
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