[Soekris] Error LED program and VPN accelerators

John Laur johnl at blurbco.com
Mon Aug 5 18:32:42 UTC 2002

On Wed, 2002-07-31 at 07:38, Eric Anderson wrote:
> John -Oordopjes- wrote:
> > Hi,
> > 
> > Can somebody tell me if the led.c program (posted in Feb. by Eric
> > Anderson) works with Linux? with new 4501 bios'es?
> It shouldn't work under linux.  The linux and FreeBSD kernels are very 
> different.. In fact, I believe the newer bios'es even broke it, but someone 
> patched it to make it work since then (I believe).
> Eric

Linux protects that memory segment, so writing directly to /dev/mem as
led.c does will not work. It may work with pre 2.4 kernels, but I can't
imagine anyone building a firewall/router/etc. with a pre 2.4 kernel.
Anyway, I wrote a module to do error led control. It's at:


It uses a very mundane /proc interface. It can turn the LED on, off, and
flash it at different speeds.


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