[syslinux] extlinux 6.03 serial console not responding to input

[Gene Cumm]

On Sun, May 17, 2015 at 2:06 PM, Ferenc Wagner via Syslinux
<syslinux at zytor.com> wrote:
> "Andrew J. Schorr via Syslinux" <syslinux at zytor.com> writes:
>
>> I just upgraded some systems from Fedora 19 (extlinux 4.05)
>> to Fedora 21 (extlinux 6.03).  I am using IPMI 2.0 serial-over-lan
>> console redirection.  Under the old version, this worked without
>> any problem:
>>
>>    serial 0 57600 0x003
>>    ui menu.c32
>>    menu title ExtLinux Boot Menu
>>    timeout 100
>>
>>    label Linux1
>>    ...
>>
>> Using the new version of extlinux in Fedora 21, I can no longer communicate
>> with the extlinux boot menu.  It does not see anything that I type.
>> I tried grub2, and that works fine.
>>
>> I tried removing the flowcontrol flag bits, and I also tried 0x00b,
>> but nothing works.
>
> I hit the same problem on Fujitsu Primergy CX250 S2 servers.  I ended up
> relying on the BIOS console redirection instead of using the native
> serial support in Syslinux.  It isn't a generic problem, though, as at
> least virtual machines can receive serial input under 6.03.  Testing
> intermediate versions would help finding the problem, but recently I
> can't request much downtime on these servers.
> --
> Regards,
> Feri.

Feri, I presume you used a non-zero flow control flag on the Fujitsu
system to get it to work properly in Syslinux-4.xx?

-- 
-Gene