I'm a newbie. I did a knoppix hd install. I could login into the kde only using root. I created another username and if i login through that, the screen goes blank, i think the xserver crashes. same thing happens if i try to login with the user id knoppix.

I have an ext3 file system.

Another problem is when i do apt-get -f update i get the following error.
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Unpacking libx11-6 (from .../libx11-6_4.3.0-7_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/libx11-6_4.3.0-7_i386.deb (--unpack):
trying to overwrite `/usr/X11R6/lib/X11/locale/lib/common/ximcp.so.2', which is also in package xlibs
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Unpacking x-dev (from .../archives/x-dev_4.3.0-7_all.deb) ...
dpkg: error processing /var/cache/apt/archives/x-dev_4.3.0-7_all.deb (--unpack):
trying to overwrite `/usr/X11R6/include/X11/DECkeysym.h', which is also in package xlibs-dev
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Unpacking libx11-dev (from .../libx11-dev_4.3.0-7_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/libx11-dev_4.3.0-7_i386.deb (--unpack):
trying to overwrite `/usr/X11R6/include/X11/XKBlib.h', which is also in package xlibs-dev
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Unpacking libxcursor-dev (from .../libxcursor-dev_1.0.2-5_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/libxcursor-dev_1.0.2-5_i386.deb (--unpack):
trying to overwrite `/usr/X11R6/include/X11/Xcursor/Xcursor.h', which is also in package xlibs-dev
Errors were encountered while processing:
/var/cache/apt/archives/libx11-6_4.3.0-7_i386.deb
/var/cache/apt/archives/x-dev_4.3.0-7_all.deb
/var/cache/apt/archives/libx11-dev_4.3.0-7_i386.deb
/var/cache/apt/archives/libxcursor-dev_1.0.2-5_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
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it would be of great help if somebody could help me fix this up because I certainly wouldn't want to login as root each time.