[syslinux] Message File to serial console

H. Peter Anvin hpa at zytor.com
Tue Sep 14 16:06:03 PDT 2004

tom.erjavec at iskratr.si wrote:
> Hello,
> I am using syslinux to boot a Soekris net4801 into LRP/Lince 1.2 linux. Net4801 has 
> no video card - it has only a serial port. During bootstrap syslinux writes the text file 
> syslinux.dpy to the serial port but it breaks the line every 15th character. I tried 
> syslinux versions 1.66 and 2.11 with same results.
> In the Archives from June 3, 2002 , there is a message on this subject ("Message 
> File to serial console"), H. Peter Anvin saying this bug has been corrected a long 
> time ago. However, syslinux 2.11 is behaving the same way. Interesting enough, if I 
> use 14hex to redirect the output to serial, I don't receive the contents of syslinux.dpy 
> through the serial port. If I use 15hex (text + serial) I do get it but it is chopped each 
> 15th character. Next surprise is that if I capture the serial console stream, the 
> contents of syslinux.dpy is not captured but the rest is. I can see the chopped strings 
> in the terminal emulation but they are not in the capture file.
> Am I doing something wrong or is net4801 handling video text stream differently or 
> is it a bug in syslinux?

Is this syslinux, pxelinux or isolinux?


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