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I'm using GNOME2. When I su in terminal and enter a command for a program that uses gtk I get an error like this :
(gedit:8562): Gtk-WARNING **: cannot open display:
Location: Rome, Italy ; Novi Sad, Srbija; Brisbane, Australia
Distribution: Ubuntu / ITOS2008
Posts: 1,207
Rep:
Since you started X with a different user than with who you are trying to run the program X is not allowing it (security)
Before you su type:
xhost +
or
xhost + localhost
then su and try to run the app again, it should work now
Hope that helps
-NSKL
It seems that in addition to using xhost +localhost, using the command export DISPLAY=LOCALHOST:0.0 enables me to open applications that use gtk after suing. I used xhost +localhost as the original user, then after I su I set export DISPLAY=LOCALHOST:0.0
Location: Rome, Italy ; Novi Sad, Srbija; Brisbane, Australia
Distribution: Ubuntu / ITOS2008
Posts: 1,207
Rep:
Yeah i knew about that, but for me i have to do that only if i ssh or telnet into another machine and try to run apps there. If i only su between local users i only need to issue xhost + with original user. I guess its different with LFS.
Thanks for the info anyway!
-NSKL
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