now it works !!
1) i have applied by hand the mkcramfs_endian.patch ( i have kernel 2.4.4 from denx ) 2) i have added { "mtdblock", 0x1f00 } in init/main.c (that line is missing in my kernel ) 3) and the commandline (for me) is "root=/dev/mtdblock2 ..." once again, thanks for all your advices , Julien -- Julien Eyries R&D engineer Thales Broadcast & Multimedia (ex-thomcast) email: julien.eyries at thales-bm.com fax: 33(0) 1 34 90 31 10 tel: 33(0) 1 34 90 31 01 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/