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Date:      Fri, 30 Nov 2001 00:36:26 +1100 (EST)
From:      Bruce Evans <bde@zeta.org.au>
To:        Peter Jeremy <peter.jeremy@alcatel.com.au>
Cc:        <freebsd-current@FreeBSD.ORG>
Subject:   Re: Panic changing screen mode with vidcontrol
Message-ID:  <20011130003256.T1674-100000@gamplex.bde.org>
In-Reply-To: <20011126173543.A7551@gsmx07.alcatel.com.au>

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On Mon, 26 Nov 2001, Peter Jeremy wrote:

> Having installed a new kernel and userland from sources about a day
> old, my vidcontrol command now causes a panic:
>
> Fatal trap 12: page fault while in vm86 mode
> fault virtual address   = 0xc359b
> ...
> The backtrace shows nothing useful - gdb doesn't seem to handle
> tracing through vm86 :-(.
>
> The command I used was "vidcontrol 132x60" after confirming that
> this was listed in "vidcontrol -i mode".  I have previously been
> using VESA_132x60, but that also panics now.
>
> Any suggestions where to look?

If it's a new bug, then it might be from not updating bios.c in the
recent pmap changes.   From error output:

./@/i386/i386/bios.c: In function `bios16':
./@/i386/i386/bios.c:379: warning: comparison between pointer and integer

Bruce


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