Bug 132295

Summary: New Root Shell responds 'Gtk-WARNING **: cannot open display:' at any graph. app. launch command
Product: [Applications] konsole Reporter: Amed <amed>
Component: generalAssignee: Konsole Bugs <konsole-bugs-null>
Status: RESOLVED NOT A BUG    
Severity: normal    
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Debian testing   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Amed 2006-08-12 11:50:03 UTC 
Version:            (using KDE KDE 3.5.3)
Installed from:    Debian testing/unstable Packages
Compiler:          gcc 4.0.3; g++ same v. 
OS:                Linux

I start konsole like user, then I launch New Root Session; from this any command to lauch a graphical application don't work: konsole responds like above or '** CRITICAL **: Unable to open display'. 
Rem. that the same operation like normal user works fine. 
It works fine even  as root directly.
Note that this appens with xfce DM (I don't know if its important or not, but it is 4 me).
I think the problem is Konsole tries 2 open a display that can't be open when in user DM.
Comment 1 Robert Knight 2006-08-13 23:09:41 UTC 
This has nothing to do with Konsole.  It is related to the X server's security mechanism:

See the section "Accessing the X Server" on this page: http://www.linux-knowledge-portal.de/en/content.php?&content/security/mightyuser.html&print