struggling with netboot images: toram parameter works partially

[Jan Kowalsky <jankow@datenkollektiv.net>]

Hi all,

while using the great debian live tools for quite a while, this week I
run into problems setting up an netboot image inside a pxe/tftp environment.

 * Debian Jessie
 * live-build 4.0.3-1

First of all: in the past if I made a configuration with something like:

lb config -b netboot --net-root-path "/srv/live-images/base"
--net-root-server "192.168.178.4" --architectures i386

live build tools configured an syslinux entry with the needed boot
append line (nfsroot etc.). In my case it didn't. So I tried to figure
out, which boot append lines I need - because I always got the error:

"waiting for ethernet card(s)" ... and it dropped me to initramfs.

Ok, booting with

append boot=live components netboot=nfs
nfsroot=192.168.178.4:/srv/live-images/base/

leads to "No supported filesystem images found at /live."

At the end I succeeded with a additionally append parameter:

  toram=filesystem.squashfs

which is the name of the image inside the nfs-root.

But strange enough this only works, if I edit the syslinux entry
directly and put it at the end of the append line. Just pass it inside
the pxe configuration doesn't work.

Is this toram meant as an valid append parameter? It appears inside the
lib/live/boot/9990-cmdline-old.

Is it a bug inside the live-boot or do I have any mistake in my
configuration?

Thanks and best Regards!