Login failed in Emdebian!

Dear All,
I am running debian on mini2440, rootfs on SD card. but I am unable to log
in over serial console. I have tried many user name password combination
but did not work.
I also have tried 

T0:123:respawn:/sbin/getty 115200 ttySAC0 it should include
T0:2345:respawn:/sbin/getty -L s3c2410_serial0 115200 vt100 Also the
/etc/securetty should list s3c2410_serial0 device instead of ttySAC0
as it was given on http://code.google.com/p/mini2440/wiki/Emdebian but it
does not show console.

I am  using rootfs from thai-embedded 

Thanks in advance....

Hey Pratik !

Did you add a user before to be able to log in ?

hey jeremy,
I forgot. i added later n its working now.
Thnx

Good I've a question,

How do you do if u want to execute a command u need root privileges ?
Because I would like to copy the rootfs to nand but I need root
privileges...

just change put init=/bin/sh into your boot parameters and you will get to
a shell after booting. the type "passwd" and enter your new root password.
that's it. reset init=/... to whatever it has been before.

Daniel

Dear Daniel,
I could log in the debian. But now I am having problem with touch screen.
i am able to sense the touch input, and also pointer moves, but its not
like mouse. I mean if i click on debian button it displays the options
until i keep stylus on touchpad. as soon as i remove stylus the options
disappear.
I have checked with 
thnx