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List:       grub-help
Subject:    Disable GRUB serial communications ?
From:       Vilius_Mockûnas <v.mockunas () gmail ! com>
Date:       2010-09-01 11:12:57
Message-ID: AANLkTikyWhLhcSXpLBaDNPA8DQ0ZUepHf8h06upo9tKk () mail ! gmail ! com
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Hello,

I have two linux boxes A and B. Each of them have serial ports (ttyS0 on
both) and these ports are connected using null modem serial cable. "A" box
is always on and it has getty process on its ttyS0 (I need this getty for
serial communication). If I reboot box B, it doesn't boot default entry -
just displays grub os select table. After some investigation I realized that
getty process on A sends some data to grub on B while it's booting and grub
behaves the same way as if some key is pressed during timeout period - it
doesn't boot default and waits for interactive user response. I need to
reboot B remotely so its no good for me. (disabling getty on A solves the
problem, but I need that getty).

Is it possible to disable any grub serial communications to solve my problem
?

thanks
Vilius

[Attachment #3 (text/html)]

Hello,<br><br>I have two linux boxes A and B. Each of them have serial port=
s (ttyS0 on both) and these ports are connected using null modem serial cab=
le. &quot;A&quot; box is always on and it has getty process on its ttyS0 (I=
 need this getty for serial communication). If I reboot box B, it doesn&#39=
;t boot default entry - just displays grub os select table. After some inve=
stigation I realized that getty process on A sends some data to grub on B w=
hile it&#39;s booting and grub behaves the same way as if some key is press=
ed during timeout period - it doesn&#39;t boot default and waits for intera=
ctive user response. I need to reboot B remotely so its no good for me. (di=
sabling getty on A solves the problem, but I need that getty).=A0 <br>
<br>Is it possible to disable any grub serial communications to solve my pr=
oblem ?<br><br>thanks<br>Vilius <br>


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