Garbage on SOL console (PE1950/lenny)

[guiguite]

I followed your instructions and disabled IPMI-over-serial-port
support on the BMC with syscfg and now I get no more garbage
characters !

Thank you very much for your help !

/tripoux

PS : Sorry for horrible english

2009/4/11 Alexander Dupuy <alex.dupuy at mac.com>:
> Guigui wrote:
>>
>> Problem is that when I'm not connected to the SOL console,  it often
>> gets garbage characters which are logged as a failed login attempt
>>
>
> We ran into this problem on PE 1950/2950 III systems as shipped from Dell,
> with RHEL 5 installed (by us) - the problem is entirely OS independent, we
> saw it also with initial ISOLINUX and GRUB bootloaders.  I don't have the
> exact subject line at hand, but if you look in the archives from late last
> year you can find my posting of the problem, and (I think) posting of the
> solution (nobody else had reported this before, so I had to figure it out
> myself, but you will benefit :-)  We had never had this problem with earlier
> PE 1950/2950 systems, will soon learn whether it also exists with new R710
> systems.
>
> The solution is to disable the IPMI-over-serial-port support on the BMC (the
> problem is that the login prompt from Linux - or any other output to the
> serial port - is interpreted as IPMI commands, for which an error is
> generated, which generates more output from Linux, ad infinitum).  You can
> disable this using the Dell syscfg tool which is I think part of the Dell
> DTK (you don't need to install OMSA, although it might be included in that
> as well) and possibly with ipmitool (although I'm not entirely sure about
> that, and don't know the specific command), but often the most convenient
> way to deal with this, especially with hardware fresh from Dell, is to use
> the BMC configuration in the BIOS setup (Ctrl-E) and select reset to
> defaults (for whatever reason, Dell ships with settings different than the
> defaults, at least for IPMI-over-serial).
>
> The specific syscfg command to use is:
>
> syscfg serialchannelaccess --ipmioverserial=disable
>
> Once you do this, you should no longer see garbage on your serial ports (is
> it really garbage? i.e. NUL and other weird ASCII that might indicate a
> serial speed mismatch, which in theory should not be possible - or is the
> garbage just odd ASCII error messages that are invalid logins? which is what
> I was seeing if I disabled getty and did a cat /dev/ttyS1).
>
> @alex
>
>