Syslinux - Apr 2011 - gpxelinux.0: pxechain to another NBP then RET fails

IRC user ernini first noticed this.  We both tried using
gpxe/gpxelinux.0 from Syslinux-4.04-pre22.  ernini used pxechain to a
commercial NBP which RETs (the same as PXELINUX) and failed.  Both of
us had success with core/pxelinux.0 from Syslinux-4.04-pre22.

For my test, I have a VM in VMware Server 2.0.2 (VMHW v7).  I loaded
gpxelinux.0 using the VM's built-in PXE ROM.  Then I used pxechain.com
to load PXELINUX 4.03 from another directory on the same TFTP server.
At this point, I tried LOCALBOOT -1 and 0.  -1 (which executes INT
19h) succeeded while 0 failed.  Ctrl-Alt-Del does not reboot the
machine.

I then used gpxe/pxelinux.gpxe and core/pxelinux.0 from
Syslinux-4.04-pre22 and gPXE to test different gPXE versions.  Using
1.0.1 results in empty packets being returned to PXELINUX.  Using
current top-of-git (commit c780ec8) resolves both issues.

-- 
-Gene

On Sun, Apr 17, 2011 at 15:49, Gene Cumm <gene.cumm at gmail.com>
wrote:
> IRC user ernini first noticed this. ?We both tried using
> gpxe/gpxelinux.0 from Syslinux-4.04-pre22. ?ernini used pxechain to a
> commercial NBP which RETs (the same as PXELINUX) and failed. ?Both of
> us had success with core/pxelinux.0 from Syslinux-4.04-pre22.
>
> For my test, I have a VM in VMware Server 2.0.2 (VMHW v7). ?I loaded
> gpxelinux.0 using the VM's built-in PXE ROM. ?Then I used pxechain.com
> to load PXELINUX 4.03 from another directory on the same TFTP server.
> At this point, I tried LOCALBOOT -1 and 0. ?-1 (which executes INT
> 19h) succeeded while 0 failed. ?Ctrl-Alt-Del does not reboot the
> machine.
>
> I then used gpxe/pxelinux.gpxe and core/pxelinux.0 from
> Syslinux-4.04-pre22 and gPXE to test different gPXE versions. ?Using
> 1.0.1 results in empty packets being returned to PXELINUX. ?Using
> current top-of-git (commit c780ec8) resolves both issues.
gPXE commit b0c3d13 should be the commit relevant to the original issue.

-- 
-Gene

On Sun, Apr 17, 2011 at 18:53, Michael Brown <mbrown at fensystems.co.uk>
wrote:
> On Sunday 17 Apr 2011 22:56:16 Arends, R.R. wrote:
>> Gene Cumm, thanks for tracking down this issue and for reporting it to
the
>> ?list.
>>
>> In our testcase on both vmware and recent hp laptop/desktop hardware I
can
>> ?confirm that applying the changes from
>>
?http://git.etherboot.org/gpxe.git/commitdiff/b0c3d134284171d844b59128b44a8
>> 6fa0579ac73
>>
>> to syslinux-4.04-pre22 fixes this issue for us.
>
> This fix is already applied upstream (in iPXE).
And for gPXE 1.0.1.

-- 
-Gene