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Installing Etch With TFTP: Linux starts, I/O Stops

I don't think the hardware is going to be the issue here.  I'm pretty 
sure it's a config issue.

I have a Soekris Net5501 box I'm installing Etch on.  I'm hooked up to 
the box with a null modem cable for the console and it's also hooked up 
to my LAN.  I've setup a PXE boot on my DNS server using tftpd-hpa.  
The 5501 starts up and I get data on the console (I'm using either 
Minicom or the screen command to read/write to the serial port).  I do 
get the boot menu from the netboot, such as it is (since pxelinux seems 
limited to 15 columns of display) and when I get the prompt, I 
type "install" and Linux starts to load, including the long row of 
dots, then the screen clears and the cursor sits on the left side of 
the screen and nothing happens from then on.

My guess is that once Linux loads communication is stopping with the 
serial port.  I don't think it's going at a different baud rate because 
there's no garbage, but if it had a simple prompt, it could come up so 
fast I miss it before the screen clears.

Here is the file structure in /var/lib/tftpboot:

|-- boot-screens
|   |-- boot.txt
|   |-- f1.txt
|   |-- f10.txt
|   |-- f2.txt
|   |-- f3.txt
|   |-- f4.txt
|   |-- f5.txt
|   |-- f6.txt
|   |-- f7.txt
|   |-- f8.txt
|   |-- f9.txt
|   `-- splash.rle
|-- initrd.gz
|-- linux
|-- orig-bu
|   |-- debian
|   |   `-- etch
|   |       `-- i386
|   |           |-- initrd.gz
|   |           `-- linux
|   |-- pxelinux.0
|   `-- pxelinux.cfg
|       |-- boot.txt
|       `-- default
|-- pxelinux.0
|-- pxelinux.cfg
|   `-- default
`-- pxelinux.cfg.serial-9600
    `-- default

I thought it might be a baud rate issue.  The 5501 starts with 19200 
baud, so I altered pxelinux.cfg/default to use the same speed and to 
specify the right console (before I added "CONSOLE 0" on one line, I'd 
get double characters).  Here's the pxelinux.cfg file:

SERIAL 0 19200
DISPLAY boot-screens/boot.txt

F1 boot-screens/f1.txt
F2 boot-screens/f2.txt
F3 boot-screens/f3.txt
F4 boot-screens/f4.txt
F5 boot-screens/f5.txt
F6 boot-screens/f6.txt
F7 boot-screens/f7.txt
F8 boot-screens/f8.txt
F9 boot-screens/f9.txt
F0 boot-screens/f10.txt

DEFAULT install

LABEL install
	kernel linux
	append vga=normal initrd=initrd.gz -- 
LABEL linux
	kernel linux
	append vga=normal initrd=initrd.gz -- 

LABEL expert
	kernel linux
	append priority=low vga=normal initrd=initrd.gz -- 

LABEL rescue
	kernel linux
	append vga=normal initrd=initrd.gz rescue/enable=true -- 

LABEL auto
	kernel linux
	append auto=true priority=critical vga=normal initrd=initrd.gz -- 


I would think this would specify the right baud rate.  Linux is loading 
and so is initrd.  It's just that I get no prompt or any screen 
activity or response after both Linux and initrd load.  I tried 
stopping my term program (in this case screen) and starting it again at 
9600, which I saw somewhere should be the default baud rate, but it 
didn't help and was still unresponsive.

I've been using this page 
(http://wiki.soekris.info/Installing_Debian_Linux_(4.0r1_Etch)) as a 
guide and had the same problems when I did everything as that page 
suggested.  Then I changed and used the setup files from Debian, which 
is how it's set up now.

What am I doing wrong or what do I need to change so after Linux and 
initrd.gz load I get a prompt or the Etch installer when it's done?  Do 
I need to include install files as well?  I didn't see that mentioned 
in any of the pages that discussed this.  If so, would I just snag a 
net install CD and copy all the files into a special directory 
somewhere in /var/lib/tftpboot?

Thanks for any help or pointers!


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