Upgrade gone bad, please help

[Joe Altman]

On Fri, Apr 23, 2004 at 09:16:52AM -0500, Joseph Koenig wrote:
> I have a system that was running FreeBSD 4.3. At the time I built the
> system, I compiled a custom kernel, but at this time, I do not need the
> modifications I made to the kernel. Turns out I never really did need them.
> So, I went to upgrade the machine to 4.9 using sysinstall. All went well,
> except when I rebooted, it says it can't find the kernel. It then boots up,
> but nothing works. I can log into the system at the physical machine, but no
> network connections work, even things such as "top" and "ps" give me 'Out of
> Memory' errors. The machine has 1 GB of RAM. I did make a complete backup of
> the system before upgrading. I also have my previous kernel. Will it help to
> reinstall the previous kernel? If so, how do I do that? Thanks,

There should be a bootable kernel, in / , no? IOW, if you didn't
remove them, you should have kernel.GENERIC and kernel.old; have you
tried booting either of those?