linux-kernel - Re: Kernel locks up when idle on VIA-nano U2300 with VIA VX800 on Jetway JNF76-N1GL-LF mainboard

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Date:	Sun, 26 Apr 2009 19:06:02 +0200
From:	Martin Mueller <mm@...21.net>
To:	linux-kernel@...r.kernel.org
Subject: Re: Kernel locks up when idle on VIA-nano U2300 with VIA VX800 on
	Jetway JNF76-N1GL-LF mainboard

Hi Jeffrey,

On Sun, Apr 26, 2009 at 12:25:51PM +0000, Jeffrey Cao wrote:
> On 2009-04-26, Martin Mueller <mm@...21.net> wrote:

> > Next, I downloaded linux-2.6.30-rc3, compiled a minimal version with
> > just initrd. I left out PCI-support, ACPI and almost everything else
> > menuconfig allowed me to unselect except the VGA text console. This
> > kernel locked up after giving me the initial prompt from busybox in
> > the initrd.
> >
> > When adding the following lines in the script executed by the kernel
> > after booting in the initrd, the system actually works:
> >
> >   while true; do true; done &
> >   /bin/sh
> >
> > As soon as I kill the shell loop, the system freezes again.
> >
> > So my conclusion is: the kernel locks up the first time the CPU
> > is idle.

> This seems something to do with the board and the hard disk drive.

Thanks for your suggestion, but it has nothing to do with the hardisk.
As I wrote above, the problem is reproducible with only an initrd, vga
text console, keyboard and no other driver loaded or compiled in.

The kernel freezes as soon as it get's idle the first time.

bye
  MM
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