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Re: Timeout broken with serial port

From: Michal Suchanek
Subject: Re: Timeout broken with serial port
Date: Mon, 5 Sep 2011 21:40:42 +0200

2011/8/24 Vladimir 'φ-coder/phcoder' Serbinenko <address@hidden>:
> On 24.08.2011 11:16, Michal Suchanek wrote:
>> Hello,
>> I was experiencing a mysterious error with grub. It would not boot
>> with timeout set.
>> It turns out that setting serial IO disables timeout.
> Check your contacts. Bad contacts are known to send noise on I/O which
> GRUB interprets as keypresses.

I did not have the cable connected at all at the other end. Connecting
it to my notebook resolves the problem.

Still it is definitely a bug in Grub that it interprets noise as keypresses.

Is there not DTR line?

If every switch with serial console failed to boot when there is
nothing connected to it there would be no internet. This is not how a
serial enabled device should behave.



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