[syslinux] gpxelinux local disk boot does not work

[Jeff Sadowski]

I downloaded syslinux-4.02 today and did the uncomment of debug in the
pxechain.asm file and did make in the modules folder then replaced the
files in my directories with the most current.

On Wed, Jul 21, 2010 at 3:36 PM, Jeffrey Hutzelman <jhutz at cmu.edu> wrote:
> --On Wednesday, July 21, 2010 11:56:21 AM -0600 Jeff Sadowski
> <jeff.sadowski at gmail.com> wrote:
>
>> With this setup it stalls when I type "test" at the pxelinux.0 prompt
>> its the same box and pxelinux.0 was downloaded through tftp
>> successfully each and every time
>
> It stops without printing anything at all?
Going back to the original with APPEND 10.255.11.252::/gpxe/gpxelinux.0
before adding debug it only printed
[quote]
TFTP boot: 10.255.11.252 /gpxe/gpxelinux.0
[/quote]
and then stalls the computer to the point I need to press the power button.
with the debug uncommented and running make then replacing pxechain.com
I get as follows
[quote]
INIT SCAN PIP GOTP 128 LEFT /gpxe/gpxelinux.0GCI
TFTP boot: 10.255.11.252 /gpxe/gpxelinux.0
[/quote]

> Unfortunately, the version of pxechain in syslinux doesn't print a version
> string at startup, so it's difficult to tell in a non-debugging version
> whether it actually loaded successfully.  I probably should push that change
> at some point.
>
>> With this setup when I type "test" at the pxelinux.0 prompt
>> it displays as follows
>> [quote]
>> TFTP boot: 10.255.11.252 pxelinux.cfg/gpxelinux.0
>> pxechain: PXENV_RESTART_TFTP [0001]
>> pxechain: PXENV_UDP_OPEN [0001]
>> boot:
>> [/quote]
>
> Right, so those messages from pxechain indicate that its calls to your PXE
> stack are failing.  The first message indicates that pxechain failed to get
> the PXE stack to download and transfer control to the new NBP (gpxelinux.0),
> and the second indicates that it failed to reopen the UDP interface before
> returning control to syslinux.  The error code 0x0001 returned in each case
> is PXENV_STATUS_FAILURE, which is fairly generic and useless.
>
> At this point you are still in the _original_ pxelinux.0, not in
> gpxelinux.0, and since the UDP interface is not open, anything that requires
> reading a file out of the syslinux configuration filesystem will fail.
>
>
> If you can build syslinux from source, I'd appreciate your trying a
> debugging version of pxechain.com.  This will produce some additional output
> which, if quoted exactly, may help figure out what is going on. Just
> uncomment the '%define DEBUG' at the top of modules/pxechain.asm (it may
> also work to add 'NASMOPTS+=-DDEBUG' to the make command line, but I haven't
> tested that and don't know what effect it might have on other components).
>
> -- Jeff
>
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