Thank gods. Found one way out, When enter GRUB menu, we should delete all graphic parameters of boot menu. only left parameters like this:
findroot (pool_rpool,0,a) kernel$ /platform/i86pc/kernel/$ISADIR/unix -B $ZFS-BOOTFS module$ /platform/i86pc/$ISADIR/boot_archive original GRUB menu like this: findroot (pool_rpool,0,a) bootfs rpool/ROOT/opensolaris <-------should delete here splashimage /boot/solaris.xpm <-------should delete here foreground d25f00 <-------should delete here background 115d93 <-------should delete here kernel$ /platform/i86pc/kernel/$ISADIR/unix -B $ZFS-BOOTFS,console=graphics <----should delete console=graphics here module$ /platform/i86pc/$ISADIR/boot_archive -- This message posted from opensolaris.org