Asset ID:	1-72-1008946.1
Update Date:	2009-02-18
Keywords:

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Solution Type  Problem Resolution Sure

Solution  1008946.1 :   Server without a keyboard hangs in boot process  


PreviouslyPublishedAs
212310

Symptoms
A system that relies on a serial Console (having no Sun[TM] keyboard attached),
hangs during the boot process.

Resolution
One reason might be the Data Carrier Detect (DCD = Pin 8) is not disabled in
the OpenBoot PROM (OBP) and it is waiting for DCD to become "active".

This will happen for instance if you try to run a system without a Sun keyboard or you are using the recommended 3-wire serial cable (Tx,Rx,Gnd) from Sun to connect your system to a Console (tip session), and the OBP "ignore DCD" parameter is not activated..
To correct this, in the OBP set the following parameters back to their
default settings:
setenv ttyb-ignore-cd true
setenv ttya-ignore-cd true

Additional Information
For a more detailed discussion of OBP settings and their interaction with a
serial console at boot time.

See SunSolve document <Document: 1003059.1>

Product
Sun Enterprise 420R Server

ttya-ignore-cd, ttyb-ignore-cd, keyboard, ttya, ttyb, boot, hang, serial, console, headless
Previously Published As
73377

Change History
Date: 2004-05-17
User Name: 25440
Action: Update Canceled
Comment: *** Restored Published Content *** Deleting. The two documents on SunSolve cover this at differing levels of detail. This is a quick "it's broken" document, the other (12166) is a more in-depth treatment. This is not a duplication.
Version: 0
Date: 2004-05-17
User Name: 25440
Action: Accepted
Comment:
Version: 0

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