Run Ubuntu 6.06 on 8.04 XEN 3.3

I am trying to run my old Ubuntu 6.06 on a newer 8.04 with backported XEN 3.3

I have tried a million different kernels.

The closest I got was booting up to when getty should present a console, i.e. just kernel messages, then nothing on the XEN console.

I can ping the domU, but not SSH into it.

I have tried kernels from within the domU filesystem with pygrub, XEN kernels from 8.10, 8.04. I have also tried compiling XEN kernels myself and point them out directly in the domU config file. I tried downloading a precompiled kernel from XEN.org. All these failed with various version of "can not load" messages. (Some disguised as can not allocate memory errors.)

Hardware is 32 bit Pentium IV. (Not 64 bit capable.)

Update: I waited a looong time (maybe half an hour) and now I can login. However I am met by a lot of:

-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied
-bash: /dev/null: Permission denied

Hitting CTRL-C got me a prompt, so things seem to work.