Hi Pierre, You need to edit a file : vi /boot/grub/grub.conf and add "acpi=off noapic quiet" at the end of the line including the kernel instructions. Then, you must save the modified file by entering the VI instruction : ESC wq ENTER 73, F6HQZ Francois # ------------------------------ # Example of grub.conf file : # ------------------------------ # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root sda1 # kernel /vmlinuz-version ro root=/dev/md2 # initrd /initrd-version.img #boot=/dev/sda default=0 timeout=10 splashimage=(hd0,0)/grub/AsteriskNOW-splash.xpm.gz title AsteriskNOW Release beta_1 (2.6.22.9-0.1.smp.gcc3.4.x86.i686) root (hd0,0) kernel /vmlinuz-2.6.22.9-0.1.smp.gcc3.4.x86.i686 ro root=/dev/md2 acpi=off noapic quiet initrd /initrd-2.6.22.9-0.1.smp.gcc3.4.x86.i686.img