Hi I have just done it. I received some errors: ls: linux-headers-3.0.0-13_3.0.0-13.21_all.deb linux-headers-3.0.0-13-generic-pae_3.0.0-13.21_i386.deb linux-image-3.0.0-13-generic_3.0.0-13.21_i386.deb linux-image-3.0.0-13-generic-pae_3.0.0-13.21_i386.deb sudo dpkg -i linux* [sudo] password for pvilela: (A ler a base de dados ... 236789 ficheiros e directórios actualmente instalados.) A preparar para substituir linux-headers-3.0.0-13 3.0.0-13.21 (a usar linux-headers-3.0.0-13_3.0.0-13.21_all.deb) ... A descompactar substituto linux-headers-3.0.0-13 ... A preparar para substituir linux-headers-3.0.0-13-generic-pae 3.0.0-13.21 (a usar linux-headers-3.0.0-13-generic-pae_3.0.0-13.21_i386.deb) ... A descompactar substituto linux-headers-3.0.0-13-generic-pae ... A preparar para substituir linux-image-3.0.0-13-generic 3.0.0-13.21 (a usar linux-image-3.0.0-13-generic_3.0.0-13.21_i386.deb) ... Done. A descompactar substituto linux-image-3.0.0-13-generic ... Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.0.0-13-generic /boot/vmlinuz-3.0.0-13-generic run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.0.0-13-generic /boot/vmlinuz-3.0.0-13-generic A preparar para substituir linux-image-3.0.0-13-generic-pae 3.0.0-13.21 (a usar linux-image-3.0.0-13-generic-pae_3.0.0-13.21_i386.deb) ... Done. A descompactar substituto linux-image-3.0.0-13-generic-pae ... Examining /etc/kernel/postrm.d . run-parts: executing /etc/kernel/postrm.d/initramfs-tools 3.0.0-13-generic-pae /boot/vmlinuz-3.0.0-13-generic-pae run-parts: executing /etc/kernel/postrm.d/zz-update-grub 3.0.0-13-generic-pae /boot/vmlinuz-3.0.0-13-generic-pae A instalar linux-headers-3.0.0-13 (3.0.0-13.21) ... A instalar linux-headers-3.0.0-13-generic-pae (3.0.0-13.21) ... Examining /etc/kernel/header_postinst.d. run-parts: executing /etc/kernel/header_postinst.d/dkms 3.0.0-13-generic-pae /boot/vmlinuz-3.0.0-13-generic-pae A instalar linux-image-3.0.0-13-generic (3.0.0-13.21) ... Running depmod. Failed to symbolic-link /boot/initrd.img-3.0.0-13-generic to initrd.img: Ficheiro já existe dpkg: erro ao processar linux-image-3.0.0-13-generic (--install): subprocesso script post-installation instalado retornou erro do status de saída 17 A instalar linux-image-3.0.0-13-generic-pae (3.0.0-13.21) ... Running depmod. Failed to symbolic-link /boot/initrd.img-3.0.0-13-generic-pae to initrd.img: Ficheiro já existe dpkg: erro ao processar linux-image-3.0.0-13-generic-pae (--install): subprocesso script post-installation instalado retornou erro do status de saída 17 Foram encontrados erros enquanto processava: linux-image-3.0.0-13-generic linux-image-3.0.0-13-generic-pae After that I booted. The problem remains, after selecting either 3.0.0-13-generic-pae or 3.0.0-13-generic, the system blocks on a magenta screen Paulo Costa 2011/10/25 Joseph Salisbury