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Re: Disable EARLY_PRINTK on IP22 to make the system boot

To: Martin Michlmayr <>
Subject: Re: Disable EARLY_PRINTK on IP22 to make the system boot
From: Dmitri Vorobiev <>
Date: Thu, 19 Nov 2009 22:05:06 +0200
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On Thu, Nov 19, 2009 at 7:00 PM, Martin Michlmayr <> wrote:
> * Dmitri Vorobiev <> [2009-11-19 18:56]:
>> > Some Debian users have reported that the kernel hangs early
>> > during boot on some IP22 systems.  Thomas Bogendoerfer found
>> > that this is due to a "bad interaction between CONFIG_EARLY_PRINTK
>> > and overwritten prom memory during early boot".  Since there's
>> > no fix yet, disable CONFIG_EARLY_PRINTK for now.
>> Never experienced anything like that, although I'm quite extensively
>> using IP22 with recent kernels. Any details on the hangs?
> It doesn't happen on all machines.  It has been reported e.g. with an
> Indigo2.  See

Interesting, thanks. Good to know that, since one of my machines is Indigo2.

> Since Thomas Bogendoerfer disagnosed the problem, he should be able to
> say more.



> --
> Martin Michlmayr

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