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Re: Lockup since 2.4.4 when switching from X to console

To: Keith Owens <kaos@xxxxxxxxxxxxxxxxx>
Subject: Re: Lockup since 2.4.4 when switching from X to console
From: Juri Haberland <juri@xxxxxxxxxxxxxx>
Date: Wed, 29 Aug 2001 09:01:13 +0200
Cc: linux-xfs@xxxxxxxxxxx
References: <17766.999038162@xxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
Keith Owens wrote:
> On Tue, 28 Aug 2001 21:40:57 +0200,
> Juri Haberland <juri@xxxxxxxxxxxxxx> wrote:
> >Jani Jaakkola wrote:
> >
> >> There are lots of motherboards around which have somewhat broken APM
> >> support or at least do not work correctly with Linux APM. Many of these
> >> machines just hang, when console blanking or unblanking using APM is
> >> attempted. This is not XFS spesific and is not even 2.4 kernel spesific.
> >
> >See, the point is that with a vanilla kernel it works without a problem
> >but with the kdb patch applied it locks up. So somehow the kdb patch
> >breaks the apm stuff and this should be investigated and, if possible,
> >resolved.
> The kdb patch goes nowhere near apm.  It sounds like apm has a bug that
> is sensitive to the layout of the kernel or stack,particularly since
> compiling without kdb configured on still has the problem. 

Ok. This and Jani Jaakkola's statement convinced me to leave that option

> Did you
> compile the kernel with frame pointers on or with kallsyms and does
> removing those options make a difference?

I compiled the kernel without frame pointers and w/o kallsyms but I can
do another test with these options on - just to see if it changes


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