@mRgOBLIN
Whoops! I didn't realize that Slackware used this configuration. I am used to 3-multiuser, 4-unused and 5-X11. This issue is now sorted out after I reconfigured init to start up to runlevel 4 in inittab.
@jamesf
My system was configured to start up to runlevel 3/5 in inittab after which I used to start X manually. Now that it has been corrected, init 3 works.
Thanks for all the help!
That said, the issue with "xdm stop" remains.
Code:
root@arikere:/home/arikere>xdm stop
xdm error (pid 2516): extra arguments on command line: "stop"
Any ideas?