Public bug reported:
I'm not sure if this is a bug in gksu, a bug in Ubuntu 6.06, or just to
do with documentation.
In Breezy (5.10) I used to run several apps as another user on
the same machine via 'gksu -u <other-username> <cmd>'
(after giving the other user's password to gnome-keyring when prompted).
Now I've upgraded to 6.06 Dapper this fails. No prompt for password,
just the errors:-
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
unable to display ":0.0"
It works if I just do 'gksu <cmd>' to run the cmd as root, but not with
'-u <username>' to run the cmd as a different user.
Similarly, if I go via Gnome > Apps > System Tools > Run as different
user, I can run commands as root, but not as any other user.
The solution I am using is to run 'xhost +local:' either manually from
the X session, or via Gnome > System > Prefs > Sessions > Startup Progs.
I'm not sure if this is the proper way to allow 'gksu -u' or if there is
a better way.
I did try creating /etc/X0.hosts (with a zero) and adding the line:
'local:', then restarting X. This seems to do part of the job: if I then
do 'xhost' it shows 'LOCAL:' as needed,
BUT if I do 'gksu -u <otheruser> <cmd>', or 'sudo -u <otheruser> xhost',
I just get the Xlib errors.
I've also tried lots of other possibilities in X0.hosts eg: 'localhost',
'<username>', '+local:', etc, etc.
I did make /etc/X0.hosts executable (755).
The password requirements have also changed: whereas I used to be
prompted by gnome-keyring for the pwd of the other user, now I just get
prompted (sudo - style) for my own pwd.
Haz
** Affects: Ubuntu
Importance: Untriaged
Status: Unconfirmed
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gksu -u and 'Run as different user' (not root) problems
https://launchpad.net/bugs/59507
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