Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

In 12.04 How do you kill the X server from the command line and from the GUI interface and how do you start it from the virtual terminal?

share|improve this question
add comment

3 Answers

Also, you can use the shortcut keys: Right Alt + Print Screen + K.

share|improve this answer
1  
What a strange combination!. Print??. It has no logic; and what would "(Right alt) + (Print Screen) + K" be in an Apple keyboard? I have right command and no print –  Robert May 3 '12 at 22:30
1  
en.wikipedia.org/wiki/Magic_SysRq_key has more info on it if you want to understand the logic behind it. printscreen is the same key as sysrq(System Request). –  semi Jul 11 '12 at 23:43
    
@semi: "printscreen is the same key as sysrq" - not on my keyboard. sysreq is the same key as delete. –  Nathan Osman May 4 '13 at 23:28
    
What happens if you hit right alt + sysrq + k on your key layout? Does it still work? I just know internally they always call it the magic sysrq key, so it seems odd that it would become the magic printscreen key just because of another layout being used. –  semi May 6 '13 at 23:13
    
Nothing happens on my machine (fresh install of 13.10). –  Andreas J. Nov 14 '13 at 1:11
add comment

One way to restart the X server is to run (from the commandline)

sudo service lightdm restart
share|improve this answer
1  
lightdm? I thought gdm was for GNOME, kdm for KDE, xdm for XFCE and lightdm for LXDE! and to stp it from the gUI? –  Robert May 3 '12 at 22:26
1  
lightdm is the default for 12.04, I'm not sure when it was made the default perhaps in 11.10? –  labarna May 3 '12 at 23:50
    
restarting lightdm doesn't kill Xorg. Only an instance of it. –  Jack Mayerz May 5 '13 at 0:23
1  
lightdm starts only one instance of Xorg, so restarting lightdm should close the only open Xorg instance, unless you're doing something much more complicated. –  labarna May 6 '13 at 13:05
add comment

Kill : xkill -a. -a means it will kill all display instances. For more information run man xkill.

Run : xinit. Also startx but this command is to start an instance and not the server itself. For more information run man xint and man startx.

I don't believe it's possible to kill Xserver from GUI, and even if it were, it would not be the right way to do it.

share|improve this answer
    
Wouldn't that kill all individual windows, which is not what the user wants? For example I don't want to kill all my firefox windows, I want to restart the visualisation. –  isomorphismes Aug 23 '13 at 1:47
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.