[snip]
I'll also try the SuperGrub2Disk ASAP.
[snip] Yes, it works when booting using a SuperGrub2Disk CD. From SuperGrub2Disk boot menu : Detect any OS -> Debian correctly found on /dev/sda4 -> boot is OK. So I suppose the GRUB on the hard disk is incorrectly setup. As the boot-info script reported in previous email. Note that others distros (Xubuntu and Sabayon) boots correctly. So how to correct GRUB regarding Debian problem ? Manually or using tools (certainly preferred solution )? I already ran update-grub but without any success. Bye. Bruno