Paste both sysctl.cfg and backup of sysctl.cfg on pastie.org. Need to examine.
Did you change anything else? When you try to shutdown and a blank screen shows up, did you check /var/log/syslog in the next boot ?? -- Shiplu Mokaddim My talks, http://talk.cmyweb.net Follow me, http://twitter.com/shiplu SUST Programmers, http://groups.google.com/group/p2psust Innovation distinguishes bet ... ... (ask Steve Jobs the rest) -- Ubuntu Bangladesh | http://ubuntu-bd.org ubuntu-bd@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bd