[syslinux] extlinux 6.03 serial console not responding to input

[Ferenc Wagner]

"Andrew J. Schorr" <aschorr at telemetry-investments.com> writes:

> On Sun, May 17, 2015 at 08:06:32PM +0200, Ferenc Wagner wrote:
>
>> "Andrew J. Schorr via Syslinux" <syslinux at zytor.com> writes:
>>
>>> 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.
>
> Thanks for confirming that I'm not hallucinating.  I guess I'll switch
> back to grub2, since that is easier for me than reconfiguring the BIOS
> settings on all of my remote machines.

Yeah, my BIOSes were redirected anyway, as we have to access the BIOS
Setup over serial.  So I just had to omit the SERIAL 0 and CONSOLE 0
configuration directives.

> Are you also using IPMI serial-over-lan on your Fujitsu servers?

Yes.

> I wonder if this problem occurs only for IPMI SOL, or whether others
> have seen it with physical serial connections.  I'd like to narrow it
> down before filing a bug report.

Good question, I haven't checked, but will as I get to it.
-- 
Regards,
Feri.