More info and how I solved this problem.... At /var/log/messages there is a message That says Cannot find map file
I change to Virtual Console. Entre username an password and I remount root: $ sudo mount -o remount,rw / I recovered network by typing: $ sudo dhclient eth0 I do a: $ sudo apt-get update $ sudo apt-get dist-upgrade $ sudo apt-get autoremove Then I tried $ sudo dpkg-reconfigure linux-image2.6.27-7-generic It gives me an error related with Virtual Box. something like: run-parts: executing /etc/kernel/postinst.d/dkms * Running DKMS auto installlation service for kernel 2.6.27-7-generic * vboxdrv (1.6.2) vboxdrv (1.6.2): Installing module ........... (bad exit status:10) Build failed. Installation Skipped [fail] I remove virtualbox: $ sudo apt-get remove --purgue virtualbox Another time: $ sudo dpkg-reconfigure linux-image2.6.27-7-generic Another error related with virtualbox. I installed VirtualBox again: $ sudo apt-get install virtualbox and: $ sudo dpkg-reconfigure linux-image2.6.27-7-generic Now everything is Ok. Now I have other problems but the filesystem is mounted rw after reboot. Some notes I take In catalan: http://acacha.dyndns.org/mediawiki/index.php/Upgrade/Actualitzaci%C3%B3_a_8.10 -- [Intrepid] GRUB Boot mkdir / rm permission problems https://bugs.launchpad.net/bugs/250189 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs