I am using the recent pxelinux.0 from syslinux 4.05
I made pxelinux.cfg a directory rather than a file
from the CDROM and then copied the old ISOLINUX.CFG
as a file called default under pxelinux.cfg
Using PXE boot with this slightly modified CDROM boot master,
PXELINUX 4.05 2011-12-09 Copyright (C) 1994-2011 H. Peter Anvin et al
!PXE entry point found (we hope) at 95A3:00D6 via plan A
UNDI code segment at 95A3 len 4C0C
UNDI data segment at 90D9 len 4CA0
Getting cached packet 01 02 03
My IP address seems to be C0A8B11C 192.168.177.28
TFTP prefix: cdrom/
Trying to load: pxelinux.cfg/default ok
And that is all we get. The part I've never changed is
using the linux kernel and initrd from the udpcast site,
as this has the udpcast enrvironment we need. These
were taken from within the ISO at
If this is a 3.1 kernel, it is much newer than the one
we've used from Debian to run the system: 2.6-32.
I've seen situations before where newer kernel on older
hardware doesn't get anywhere until some magic incantation
is found. But it is silent, like the serial console is
part of the issue.
On Fri, 25 May 2012, Alain Knaff wrote:
Weird... normally, it's supposed to be the same kernel for PXE and
CDROM. Only floppy is different (for size reasons).
Does it work if you boot using PXE off a CDROM master?
On 25/05/12 16:15, D G Teed wrote:
I've been away from udpcast for awhile. Now
I am using it for imaging on a cluster.
I'm having difficulty booting from CDROM
with working serial console. I can boot the system
with PXE and run the Debian installer over
serial console OK, and Debian booted from
hard drive will display and control OK over
With ISOLINUX, it shows a little progress over
the serial console, and then it is silent.
I started with the udpcd.iso (as of May 24, 2012 on the
udpcast website), mounted it, copied to an 'extracted'
directory and added my options for serial console.
Here is my ISOLIUX.CFG :
append root=/dev/ram0 initrd=initrd console=ttyS0,9600
I run genisoimage within the "extracted" directory copy:
genisoimage -o ../serial-udpcd.iso -b ISOLINUX.BIN -c boot.catalog
-no-emul-boot -boot-load-size 4 -boot-info-table .
It will get as far this:
ISOLINUX 3.63 Debian-2008-07-15 Copyright (C) 1994-2008 H. Peter Anvin
boot: Loading linux................ Loading
I've tried current syslinux files for isolinux.bin and pxelinux.0
ISOLINUX 4.05 2011-12-09 ETCD Copyright (C) 1994-2011 H. Peter Anvin et
al Loading linux... Loading initrd..........ready.
I've tried CONSOLE 0 within ISOLINUX.CFG and it causes the ISOLINUX
banner to appear and that is all.
Here is the pxelinux.cfg/default which works OK with the Debian
SERIAL 0 9600
Then within one of the boot-screen menu files txt.cfg:
menu label ^Install
append vga=788 initrd=debian-installer/amd64/initrd.gz -- quiet
noapic acpi=off console=ttyS0,9600 earlyprint=serial,ttyS0,9600
The kernel from udpcast doesn't like all of these options, so they were
The systems are Sun V20z and they are connected with a serial hub.
I thought maybe I could save on some CDs by asking for some help. :-)
My thinking is to use CDROM for uploading master disk image,
and PXE for automated imaging. It should prevent mistakes.
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