Have you unset the netaddr and dlserver PROM variables?
unsetenv netaddr and unsetenv dlserver. The machine downloads the kernel, but then “hangs” (using a monitor and keyboard — not serial console) Unfortunately, not all graphics frame buffers are supported under Linux yet. This doesn’t mean you can’t use the machine… it just means you’ll need a null-modem serial cable to interact with it. It is quite possible that the machine is in fact running, however, the system is outputting to the serial console rather than the screen. 6. Cobalt Specific FAQs Why won’t my Cobalt machine boot? This could be for a number of reasons. Our easiest bet however is to run through a checklist and make sure everything is correct. • Have you got the Cobalt machine (and server) plugged into the right network ports? Make sure the network is cabled correctly. Please note, the Cobalt firmware will only boot via the Primary network port.
