How can I run a script that starts before my login screen?

I was calibrating my touch screen, and saw that the best tool around was xinput_calibrator. So I used it. It have two options (one of which did not work), so I am here for the second. It says I should execute this command “in a script that starts with your X session”:

xinput set-int-prop "3M 3M USB Touchscreen - EX II" "Evdev Axis Calibration" 32 14410 2146 14574 2115

So I tried ~/.xinitrc, ~/.xsession and ~/.xsessionrc, all of which did not exist. So I created them and the exact content was this command. The first two files made my logins fail (after I login, I fall back to the login screen).

With the last file, the calibration was functional, but only after logging in…

I need that command to run before the login dialog shows up. I thought of adding this command to the end of /etc/X11/xinit/xinitrc with no result (nothing changed). Also, I tried to add it to the end of /etc/X11/Xsession.d/40x11-common_xsessionrc (after inspecting some of the files), but the result was exactly the same as adding it to ~/.xsessionrc.

How can I make this command run before the login screen shows (is this before the window manager starts, or before the X session starts)?

(I am running Kubuntu with the default window manager, if that matters)

UPDATE As I am using Kubuntu, my display manager is kdm. As the accepted answer suggests, I edited the file /etc/kde4/kdm/Xsetup, and as mentioned here I added the command before the command that is there by default. And it works like a charm 🙂

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

All the files you tried to change are read after you log in. Furthermore, ~/.xinitrc and ~/.xsession are the full set of commands that run in a session; ~/.xinitrc is read if you run xinit or startx from a text mode prompt, and ~/.xsession is read if you run a “custom session” (the name may vary) from a graphical login prompt.

You need to configure your display manager, the program that shows the login prompt. For kdm, the KDE display manager, add your command to /etc/kde4/kdm/Xsetup (or /etc/kde3/kdm/Xsetup for older versions) (that’s the path on Debian, I haven’t verified that Kubuntu uses the same path).

For gdm (the Gnome display manager), add your command to /etc/gdm/Init/Default. For xdm (the traditional X display manager), add your command to /etc/X11/xdm/Xsetup.

Method 2

I suggest that you create your own config file, a simple example:

/usr/lib/X11/xorg.conf.d/20-calibration.conf

Filecontent:
Section "InputClass"
         Identifier "Calibration"
         MatchProduct "3M 3M USB Touchscreen - EX II"
         Option "Calibration" "14410 2146 14574 2115"
EndSection

That should do the trick.

Method 3

You could try /etc/rc.local ?

.

Method 4

When you have OpenSUSE you can copy your script to /etc/init.d and run insserv script name. insserv enables a script: http://man-wiki.net/index.php/8:insserv.


All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

0 0 votes
Article Rating
Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments