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In ubuntu 13.10 in order to install numlockx you had to run:
sudo apt-get install numlockx
After you install numlockx you had to run:
gksudo gedit /etc/lightdm/lightdm.conf
At the end of this file you had to enter greeter-setup-script=/usr/bin/numlockx on
In 14.04 when you run gksudo gedit /etc/lightdm/lightdm.conf it opens up a blank file....
How do i set up numlockx in 14.04?

I have also tried to follow this answer but that did not work either.

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3 Answers 3

Try adding this line:

greeter-setup-script=/usr/bin/numlockx on

to the file /usr/share/lightdm/lightdm.conf.d/50-unity-greeter.conf.

however this file will be overwritten when the unity-greeter is upgraded. For a more permanent solution, add these lines:

[SeatDefaults]
greeter-setup-script=/usr/bin/numlockx on

to a seperate .conf file that you create in either the /etc/lightdm/lightdm.conf.d/ or in the /usr/share/lightdm/lightdm.conf.d/ folder.

thanks Gunnar Hjalmarsson for pointing that out

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No, don't do that. 50-unity-greeter.conf belongs to the unity-greeter package, and any changes will be overwritten next time unity-greeter is upgraded. –  Gunnar Hjalmarsson Sep 14 at 13:10
    
so what file should it be added to then? it tried adding it to the file/etc/lightdm/lightdm.conf.d/50-unity-greeter.conf to no avail –  drizzle Sep 14 at 13:49
    
in fact it does work, i had forgotten to include the [SeatDefaults] line before. thanks for the help –  drizzle Sep 14 at 14:51
    
The best approach IMO is to create a separate .conf file, either in /usr/share/lightdm/lightdm.conf.d or in /etc/lightdm/lightdm.conf.d. Enabling numlock has nothing to do with unity-greeter, has it? –  Gunnar Hjalmarsson Sep 14 at 17:55
    
Thanks for responding. What is the unity-greeter about then, except for performing tasks that need to be done at the login interface? –  drizzle Sep 14 at 18:39

For Lubuntu 14.04 I edited the file ~/.config/lxsession/Lubuntu/autostart and appended the line:

@/usr/bin/numlockx on
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You can create the file, but you need to add an extra line, so it looks like:

[SeatDefaults]
greeter-setup-script=/usr/bin/numlockx on
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