Hi,
thanks for your help.
first, i must give you precision : the key turned with another distro (home made by a friend) on my dell inspiron 6000, but i made the error formating it in order to change the distribution.
So, i've a look to some posts that said i had to modify the boot with this syntax : livecd irqpoll noapic. I would like to try that, but i don't know where and what modify. Syslinux.cfg ? In wich i have :
default livecd
prompt 1
timeout 150
display splash.msg
label livecd
kernel vmlinuz
append livecd=livecd initrd=initrd.gz root=/dev/rd/3 vga=788 keyb=us fromusb
label safeboot
kernel vmlinuz
append livecd=livecd initrd=initrd.gz root=/dev/rd/3 acpi=off vga=normal keyb=us noapic nolapic nopcmcia nomce unionfs=no fromusb
label lenovo
kernel vmlinuz
append livecd=livecd initrd=initrd.gz root=/dev/rd/3 keyb=us vga=788 fromusb irqpoll noapic
label vesa
kernel vmlinuz
append livecd=livecd initrd=initrd.gz root=/dev/rd/3 keyb=us vga=788 fromusb olddetect vesa