Re: debugging a kernel that doesn't start

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Mon, Sep 12, 2022 at 10:02:33PM +0200, Edgar Fuß wrote:
> > Have you tried booting a custom kernel with some drivers removed?
> No. I wouldn't know which drivers to remove.
> The problem is the Kernel utters absolutely nothing, so it must hang very, 
> very early.
> 
> > have you tried an uncompressed one?
> No, but I guess the official install image (on a USB key) is supposed to 
> work as-is, no?
> 
> > The simplest way to debug something is using a serial port, do you have
> > access to the one on this machine?
> Yes, there is one. It seems to sort-of mirror the on-screen messages up to 
> the point the NetBSD boot runs. I tried
> 	consdev com0,9600
> from the boot prompt but that hung the machine.

On some systems I have to set the ioaddr too

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--