Examining your DpkgTerminalLog.txt file I see the following:
Searching for GRUB installation directory ...
No GRUB directory found. To create a template run 'mkdir /boot/grub'
first. To install grub, install it manually or try the 'grub-install'
command. ### Warning, grub-install is used to change your MBR. ###
User postinst hook script [/sbin/update-grub] exited with value 1
dpkg : erreur de traitement de linux-image-2.6.28-13-generic
(--configure) :
le sous-processus post-installation script a retourné une erreur de
sortie d'état 1
Have you removed/uninstalled grub?
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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dist-upgrade failed on linux-generic
https://bugs.launchpad.net/bugs/398795
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