disk less workstation : pxe + nfs boot problem

[depx]

bonjour tout le monde,

I'm trying to boot a disk less workstation (not as ltsp) and the boot
process fail a little after the kernel :

I'm based on breezy and i'm using a different root for the server and
the workstation 


        ... end of kernel start ...
        Begin: Initializing /dev ...
        Done.
        Begin: Running /scripts/init-premount
        Done.
        Begin: Running /scripts/local-top
        [45....32] device-mapper: 4.40-ioctl (2005-01-12) initialised :
            No volume groups found
        Done.
        ALERT! does not exist. dropping to a shell!
        
        BusyBox v1.00pre10 (debian .....) built-in shel (ash)
        Enter 'help' for a list of built-in commands.
        
        /bin/sh: can't  access tty: job control turned off
        

i crawled on google without any success :

I don't know if my kernels parameters are wrong or if i have to modify
something in the boot process ?


about the disk less workstation


        /pxelinux.cfg/default
        
        
                label linux
                kernel /boot/vmlinuz-2.6.12-10-k7
                append vga=791 nfsroot=192.168.0.1:/opt/diskless
                initrd=/boot/initrd.img-2.6.12-10-k7 ramdisk_size=8192
                init=/sbin/init 
                
        
        /etc/fstab
        
        
                # <file system> <mount point>   <type>  <options>
                <dump>  <pass>
                proc            /proc           proc    defaults
                0       0
                192.168.0.1:/opt/diskless      /   nfs rw,hard,intr    0
                0
                

about the server


        /etc/dhcp3/dhcpd.conf
        
        
                option domain-name-servers 80.118.196.40,
                80.118.192.110;
                
                default-lease-time 6000;
                max-lease-time 6000;
                authoritative;
                
                subnet 192.168.0.0 netmask 255.255.255.0
                {
                  range 192.168.0.100 192.168.0.200;
                  option routers 192.168.0.1;
                }
                 
                allow booting;
                allow bootp;
                
                option root-path "/opt/diskless/";
                filename "/pxelinux.0";
                	
        
        /etc/exports
        
        
                /opt/diskless   *(rw,no_root_squash,no_all_squash)



Merci d'avance :)
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